20387640

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{1867}}^1$

素因数の和:1901

約数の個数: 128

約数和(自身を含む): 75317760

約数和(自身を除く): 54930120

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 13, 14, 15, 20, 21, 24, 26, 28, 30, 35, 39, 40, 42, 52, 56, 60, 65, 70, 78, 84, 91, 104, 105, 120, 130, 140, 156, 168, 182, 195, 210, 260, 273, 280, 312, 364, 390, 420, 455, 520, 546, 728, 780, 840, 910, 1092, 1365, 1560, 1820, 1867, 2184, 2730, 3640, 3734, 5460, 5601, 7468, 9335, 10920, 11202, 13069, 14936, 18670, 22404, 24271, 26138, 28005, 37340, 39207, 44808, 48542, 52276, 56010, 65345, 72813, 74680, 78414, 97084, 104552, 112020, 121355, 130690, 145626, 156828, 169897, 194168, 196035, 224040, 242710, 261380, 291252, 313656, 339794, 364065, 392070, 485420, 509691, 522760, 582504, 679588, 728130, 784140, 849485, 970840, 1019382, 1359176, 1456260, 1568280, 1698970, 2038764, 2548455, 2912520, 3397940, 4077528, 5096910, 6795880, 10193820, 20387640]

約数ペア:

[(1, 20387640), (2, 10193820), (3, 6795880), (4, 5096910), (5, 4077528), (6, 3397940), (7, 2912520), (8, 2548455), (10, 2038764), (12, 1698970), (13, 1568280), (14, 1456260), (15, 1359176), (20, 1019382), (21, 970840), (24, 849485), (26, 784140), (28, 728130), (30, 679588), (35, 582504), (39, 522760), (40, 509691), (42, 485420), (52, 392070), (56, 364065), (60, 339794), (65, 313656), (70, 291252), (78, 261380), (84, 242710), (91, 224040), (104, 196035), (105, 194168), (120, 169897), (130, 156828), (140, 145626), (156, 130690), (168, 121355), (182, 112020), (195, 104552), (210, 97084), (260, 78414), (273, 74680), (280, 72813), (312, 65345), (364, 56010), (390, 52276), (420, 48542), (455, 44808), (520, 39207), (546, 37340), (728, 28005), (780, 26138), (840, 24271), (910, 22404), (1092, 18670), (1365, 14936), (1560, 13069), (1820, 11202), (1867, 10920), (2184, 9335), (2730, 7468), (3640, 5601), (3734, 5460)]