21251880

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{239}}^1$

素因数の和:288

約数の個数: 192

約数和(自身を含む): 78624000

約数和(自身を除く): 57372120

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 15, 18, 19, 20, 24, 26, 30, 36, 38, 39, 40, 45, 52, 57, 60, 65, 72, 76, 78, 90, 95, 104, 114, 117, 120, 130, 152, 156, 171, 180, 190, 195, 228, 234, 239, 247, 260, 285, 312, 342, 360, 380, 390, 456, 468, 478, 494, 520, 570, 585, 684, 717, 741, 760, 780, 855, 936, 956, 988, 1140, 1170, 1195, 1235, 1368, 1434, 1482, 1560, 1710, 1912, 1976, 2151, 2223, 2280, 2340, 2390, 2470, 2868, 2964, 3107, 3420, 3585, 3705, 4302, 4446, 4541, 4680, 4780, 4940, 5736, 5928, 6214, 6840, 7170, 7410, 8604, 8892, 9082, 9321, 9560, 9880, 10755, 11115, 12428, 13623, 14340, 14820, 15535, 17208, 17784, 18164, 18642, 21510, 22230, 22705, 24856, 27246, 27963, 28680, 29640, 31070, 36328, 37284, 40869, 43020, 44460, 45410, 46605, 54492, 55926, 59033, 62140, 68115, 74568, 81738, 86040, 88920, 90820, 93210, 108984, 111852, 118066, 124280, 136230, 139815, 163476, 177099, 181640, 186420, 204345, 223704, 236132, 272460, 279630, 295165, 326952, 354198, 372840, 408690, 472264, 531297, 544920, 559260, 590330, 708396, 817380, 885495, 1062594, 1118520, 1180660, 1416792, 1634760, 1770990, 2125188, 2361320, 2656485, 3541980, 4250376, 5312970, 7083960, 10625940, 21251880]

約数ペア:

[(1, 21251880), (2, 10625940), (3, 7083960), (4, 5312970), (5, 4250376), (6, 3541980), (8, 2656485), (9, 2361320), (10, 2125188), (12, 1770990), (13, 1634760), (15, 1416792), (18, 1180660), (19, 1118520), (20, 1062594), (24, 885495), (26, 817380), (30, 708396), (36, 590330), (38, 559260), (39, 544920), (40, 531297), (45, 472264), (52, 408690), (57, 372840), (60, 354198), (65, 326952), (72, 295165), (76, 279630), (78, 272460), (90, 236132), (95, 223704), (104, 204345), (114, 186420), (117, 181640), (120, 177099), (130, 163476), (152, 139815), (156, 136230), (171, 124280), (180, 118066), (190, 111852), (195, 108984), (228, 93210), (234, 90820), (239, 88920), (247, 86040), (260, 81738), (285, 74568), (312, 68115), (342, 62140), (360, 59033), (380, 55926), (390, 54492), (456, 46605), (468, 45410), (478, 44460), (494, 43020), (520, 40869), (570, 37284), (585, 36328), (684, 31070), (717, 29640), (741, 28680), (760, 27963), (780, 27246), (855, 24856), (936, 22705), (956, 22230), (988, 21510), (1140, 18642), (1170, 18164), (1195, 17784), (1235, 17208), (1368, 15535), (1434, 14820), (1482, 14340), (1560, 13623), (1710, 12428), (1912, 11115), (1976, 10755), (2151, 9880), (2223, 9560), (2280, 9321), (2340, 9082), (2390, 8892), (2470, 8604), (2868, 7410), (2964, 7170), (3107, 6840), (3420, 6214), (3585, 5928), (3705, 5736), (4302, 4940), (4446, 4780), (4541, 4680)]