21997560

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{239}}^1$

素因数の和:325

約数の個数: 128

約数和(自身を含む): 72576000

約数和(自身を除く): 50578440

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 52, 59, 60, 65, 78, 104, 118, 120, 130, 156, 177, 195, 236, 239, 260, 295, 312, 354, 390, 472, 478, 520, 590, 708, 717, 767, 780, 885, 956, 1180, 1195, 1416, 1434, 1534, 1560, 1770, 1912, 2301, 2360, 2390, 2868, 3068, 3107, 3540, 3585, 3835, 4602, 4780, 5736, 6136, 6214, 7080, 7170, 7670, 9204, 9321, 9560, 11505, 12428, 14101, 14340, 15340, 15535, 18408, 18642, 23010, 24856, 28202, 28680, 30680, 31070, 37284, 42303, 46020, 46605, 56404, 62140, 70505, 74568, 84606, 92040, 93210, 112808, 124280, 141010, 169212, 183313, 186420, 211515, 282020, 338424, 366626, 372840, 423030, 549939, 564040, 733252, 846060, 916565, 1099878, 1466504, 1692120, 1833130, 2199756, 2749695, 3666260, 4399512, 5499390, 7332520, 10998780, 21997560]

約数ペア:

[(1, 21997560), (2, 10998780), (3, 7332520), (4, 5499390), (5, 4399512), (6, 3666260), (8, 2749695), (10, 2199756), (12, 1833130), (13, 1692120), (15, 1466504), (20, 1099878), (24, 916565), (26, 846060), (30, 733252), (39, 564040), (40, 549939), (52, 423030), (59, 372840), (60, 366626), (65, 338424), (78, 282020), (104, 211515), (118, 186420), (120, 183313), (130, 169212), (156, 141010), (177, 124280), (195, 112808), (236, 93210), (239, 92040), (260, 84606), (295, 74568), (312, 70505), (354, 62140), (390, 56404), (472, 46605), (478, 46020), (520, 42303), (590, 37284), (708, 31070), (717, 30680), (767, 28680), (780, 28202), (885, 24856), (956, 23010), (1180, 18642), (1195, 18408), (1416, 15535), (1434, 15340), (1534, 14340), (1560, 14101), (1770, 12428), (1912, 11505), (2301, 9560), (2360, 9321), (2390, 9204), (2868, 7670), (3068, 7170), (3107, 7080), (3540, 6214), (3585, 6136), (3835, 5736), (4602, 4780)]