20935980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{389}}^1$

素因数の和:440

約数の個数: 144

約数和(自身を含む): 71547840

約数和(自身を除く): 50611860

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 23, 26, 30, 36, 39, 45, 46, 52, 60, 65, 69, 78, 90, 92, 115, 117, 130, 138, 156, 180, 195, 207, 230, 234, 260, 276, 299, 345, 389, 390, 414, 460, 468, 585, 598, 690, 778, 780, 828, 897, 1035, 1167, 1170, 1196, 1380, 1495, 1556, 1794, 1945, 2070, 2334, 2340, 2691, 2990, 3501, 3588, 3890, 4140, 4485, 4668, 5057, 5382, 5835, 5980, 7002, 7780, 8947, 8970, 10114, 10764, 11670, 13455, 14004, 15171, 17505, 17894, 17940, 20228, 23340, 25285, 26841, 26910, 30342, 35010, 35788, 44735, 45513, 50570, 53682, 53820, 60684, 70020, 75855, 80523, 89470, 91026, 101140, 107364, 116311, 134205, 151710, 161046, 178940, 182052, 227565, 232622, 268410, 303420, 322092, 348933, 402615, 455130, 465244, 536820, 581555, 697866, 805230, 910260, 1046799, 1163110, 1395732, 1610460, 1744665, 2093598, 2326220, 3489330, 4187196, 5233995, 6978660, 10467990, 20935980]

約数ペア:

[(1, 20935980), (2, 10467990), (3, 6978660), (4, 5233995), (5, 4187196), (6, 3489330), (9, 2326220), (10, 2093598), (12, 1744665), (13, 1610460), (15, 1395732), (18, 1163110), (20, 1046799), (23, 910260), (26, 805230), (30, 697866), (36, 581555), (39, 536820), (45, 465244), (46, 455130), (52, 402615), (60, 348933), (65, 322092), (69, 303420), (78, 268410), (90, 232622), (92, 227565), (115, 182052), (117, 178940), (130, 161046), (138, 151710), (156, 134205), (180, 116311), (195, 107364), (207, 101140), (230, 91026), (234, 89470), (260, 80523), (276, 75855), (299, 70020), (345, 60684), (389, 53820), (390, 53682), (414, 50570), (460, 45513), (468, 44735), (585, 35788), (598, 35010), (690, 30342), (778, 26910), (780, 26841), (828, 25285), (897, 23340), (1035, 20228), (1167, 17940), (1170, 17894), (1196, 17505), (1380, 15171), (1495, 14004), (1556, 13455), (1794, 11670), (1945, 10764), (2070, 10114), (2334, 8970), (2340, 8947), (2691, 7780), (2990, 7002), (3501, 5980), (3588, 5835), (3890, 5382), (4140, 5057), (4485, 4668)]