20430760

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{557}}^1$

素因数の和:706

約数の個数: 64

約数和(自身を含む): 53032320

約数和(自身を除く): 32601560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 131, 140, 262, 280, 524, 557, 655, 917, 1048, 1114, 1310, 1834, 2228, 2620, 2785, 3668, 3899, 4456, 4585, 5240, 5570, 7336, 7798, 9170, 11140, 15596, 18340, 19495, 22280, 31192, 36680, 38990, 72967, 77980, 145934, 155960, 291868, 364835, 510769, 583736, 729670, 1021538, 1459340, 2043076, 2553845, 2918680, 4086152, 5107690, 10215380, 20430760]

約数ペア:

[(1, 20430760), (2, 10215380), (4, 5107690), (5, 4086152), (7, 2918680), (8, 2553845), (10, 2043076), (14, 1459340), (20, 1021538), (28, 729670), (35, 583736), (40, 510769), (56, 364835), (70, 291868), (131, 155960), (140, 145934), (262, 77980), (280, 72967), (524, 38990), (557, 36680), (655, 31192), (917, 22280), (1048, 19495), (1114, 18340), (1310, 15596), (1834, 11140), (2228, 9170), (2620, 7798), (2785, 7336), (3668, 5570), (3899, 5240), (4456, 4585)]