20865780

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{241}}^1$

素因数の和:306

約数の個数: 144

約数和(自身を含む): 70294224

約数和(自身を除く): 49428444

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 30, 36, 37, 39, 45, 52, 60, 65, 74, 78, 90, 111, 117, 130, 148, 156, 180, 185, 195, 222, 234, 241, 260, 333, 370, 390, 444, 468, 481, 482, 555, 585, 666, 723, 740, 780, 962, 964, 1110, 1170, 1205, 1332, 1443, 1446, 1665, 1924, 2169, 2220, 2340, 2405, 2410, 2886, 2892, 3133, 3330, 3615, 4329, 4338, 4810, 4820, 5772, 6266, 6660, 7215, 7230, 8658, 8676, 8917, 9399, 9620, 10845, 12532, 14430, 14460, 15665, 17316, 17834, 18798, 21645, 21690, 26751, 28197, 28860, 31330, 35668, 37596, 43290, 43380, 44585, 46995, 53502, 56394, 62660, 80253, 86580, 89170, 93990, 107004, 112788, 115921, 133755, 140985, 160506, 178340, 187980, 231842, 267510, 281970, 321012, 347763, 401265, 463684, 535020, 563940, 579605, 695526, 802530, 1043289, 1159210, 1391052, 1605060, 1738815, 2086578, 2318420, 3477630, 4173156, 5216445, 6955260, 10432890, 20865780]

約数ペア:

[(1, 20865780), (2, 10432890), (3, 6955260), (4, 5216445), (5, 4173156), (6, 3477630), (9, 2318420), (10, 2086578), (12, 1738815), (13, 1605060), (15, 1391052), (18, 1159210), (20, 1043289), (26, 802530), (30, 695526), (36, 579605), (37, 563940), (39, 535020), (45, 463684), (52, 401265), (60, 347763), (65, 321012), (74, 281970), (78, 267510), (90, 231842), (111, 187980), (117, 178340), (130, 160506), (148, 140985), (156, 133755), (180, 115921), (185, 112788), (195, 107004), (222, 93990), (234, 89170), (241, 86580), (260, 80253), (333, 62660), (370, 56394), (390, 53502), (444, 46995), (468, 44585), (481, 43380), (482, 43290), (555, 37596), (585, 35668), (666, 31330), (723, 28860), (740, 28197), (780, 26751), (962, 21690), (964, 21645), (1110, 18798), (1170, 17834), (1205, 17316), (1332, 15665), (1443, 14460), (1446, 14430), (1665, 12532), (1924, 10845), (2169, 9620), (2220, 9399), (2340, 8917), (2405, 8676), (2410, 8658), (2886, 7230), (2892, 7215), (3133, 6660), (3330, 6266), (3615, 5772), (4329, 4820), (4338, 4810)]