19985940

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{13}}^2\times {\mathrm{73}}^1$

素因数の和:120

約数の個数: 180

約数和(自身を含む): 68820444

約数和(自身を除く): 48834504

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 27, 30, 36, 39, 45, 52, 54, 60, 65, 73, 78, 81, 90, 108, 117, 130, 135, 146, 156, 162, 169, 180, 195, 219, 234, 260, 270, 292, 324, 338, 351, 365, 390, 405, 438, 468, 507, 540, 585, 657, 676, 702, 730, 780, 810, 845, 876, 949, 1014, 1053, 1095, 1170, 1314, 1404, 1460, 1521, 1620, 1690, 1755, 1898, 1971, 2028, 2106, 2190, 2340, 2535, 2628, 2847, 3042, 3285, 3380, 3510, 3796, 3942, 4212, 4380, 4563, 4745, 5070, 5265, 5694, 5913, 6084, 6570, 7020, 7605, 7884, 8541, 9126, 9490, 9855, 10140, 10530, 11388, 11826, 12337, 13140, 13689, 14235, 15210, 17082, 18252, 18980, 19710, 21060, 22815, 23652, 24674, 25623, 27378, 28470, 29565, 30420, 34164, 37011, 39420, 42705, 45630, 49348, 51246, 54756, 56940, 59130, 61685, 68445, 74022, 76869, 85410, 91260, 102492, 111033, 118260, 123370, 128115, 136890, 148044, 153738, 170820, 185055, 222066, 246740, 256230, 273780, 307476, 333099, 370110, 384345, 444132, 512460, 555165, 666198, 740220, 768690, 999297, 1110330, 1332396, 1537380, 1665495, 1998594, 2220660, 3330990, 3997188, 4996485, 6661980, 9992970, 19985940]

約数ペア:

[(1, 19985940), (2, 9992970), (3, 6661980), (4, 4996485), (5, 3997188), (6, 3330990), (9, 2220660), (10, 1998594), (12, 1665495), (13, 1537380), (15, 1332396), (18, 1110330), (20, 999297), (26, 768690), (27, 740220), (30, 666198), (36, 555165), (39, 512460), (45, 444132), (52, 384345), (54, 370110), (60, 333099), (65, 307476), (73, 273780), (78, 256230), (81, 246740), (90, 222066), (108, 185055), (117, 170820), (130, 153738), (135, 148044), (146, 136890), (156, 128115), (162, 123370), (169, 118260), (180, 111033), (195, 102492), (219, 91260), (234, 85410), (260, 76869), (270, 74022), (292, 68445), (324, 61685), (338, 59130), (351, 56940), (365, 54756), (390, 51246), (405, 49348), (438, 45630), (468, 42705), (507, 39420), (540, 37011), (585, 34164), (657, 30420), (676, 29565), (702, 28470), (730, 27378), (780, 25623), (810, 24674), (845, 23652), (876, 22815), (949, 21060), (1014, 19710), (1053, 18980), (1095, 18252), (1170, 17082), (1314, 15210), (1404, 14235), (1460, 13689), (1521, 13140), (1620, 12337), (1690, 11826), (1755, 11388), (1898, 10530), (1971, 10140), (2028, 9855), (2106, 9490), (2190, 9126), (2340, 8541), (2535, 7884), (2628, 7605), (2847, 7020), (3042, 6570), (3285, 6084), (3380, 5913), (3510, 5694), (3796, 5265), (3942, 5070), (4212, 4745), (4380, 4563)]