31191720

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{523}}^1$

素因数の和:615

約数の個数: 128

約数和(自身を含む): 108656640

約数和(自身を除く): 77464920

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 71, 84, 105, 120, 140, 142, 168, 210, 213, 280, 284, 355, 420, 426, 497, 523, 568, 710, 840, 852, 994, 1046, 1065, 1420, 1491, 1569, 1704, 1988, 2092, 2130, 2485, 2615, 2840, 2982, 3138, 3661, 3976, 4184, 4260, 4970, 5230, 5964, 6276, 7322, 7455, 7845, 8520, 9940, 10460, 10983, 11928, 12552, 14644, 14910, 15690, 18305, 19880, 20920, 21966, 29288, 29820, 31380, 36610, 37133, 43932, 54915, 59640, 62760, 73220, 74266, 87864, 109830, 111399, 146440, 148532, 185665, 219660, 222798, 259931, 297064, 371330, 439320, 445596, 519862, 556995, 742660, 779793, 891192, 1039724, 1113990, 1299655, 1485320, 1559586, 2079448, 2227980, 2599310, 3119172, 3898965, 4455960, 5198620, 6238344, 7797930, 10397240, 15595860, 31191720]

約数ペア:

[(1, 31191720), (2, 15595860), (3, 10397240), (4, 7797930), (5, 6238344), (6, 5198620), (7, 4455960), (8, 3898965), (10, 3119172), (12, 2599310), (14, 2227980), (15, 2079448), (20, 1559586), (21, 1485320), (24, 1299655), (28, 1113990), (30, 1039724), (35, 891192), (40, 779793), (42, 742660), (56, 556995), (60, 519862), (70, 445596), (71, 439320), (84, 371330), (105, 297064), (120, 259931), (140, 222798), (142, 219660), (168, 185665), (210, 148532), (213, 146440), (280, 111399), (284, 109830), (355, 87864), (420, 74266), (426, 73220), (497, 62760), (523, 59640), (568, 54915), (710, 43932), (840, 37133), (852, 36610), (994, 31380), (1046, 29820), (1065, 29288), (1420, 21966), (1491, 20920), (1569, 19880), (1704, 18305), (1988, 15690), (2092, 14910), (2130, 14644), (2485, 12552), (2615, 11928), (2840, 10983), (2982, 10460), (3138, 9940), (3661, 8520), (3976, 7845), (4184, 7455), (4260, 7322), (4970, 6276), (5230, 5964)]