388489990

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{78167}}^1$

素因数の和:78252

約数の個数: 32

約数和(自身を含む): 810445824

約数和(自身を除く): 421955834

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 71, 142, 355, 497, 710, 994, 2485, 4970, 78167, 156334, 390835, 547169, 781670, 1094338, 2735845, 5471690, 5549857, 11099714, 27749285, 38848999, 55498570, 77697998, 194244995, 388489990]

約数ペア:

[(1, 388489990), (2, 194244995), (5, 77697998), (7, 55498570), (10, 38848999), (14, 27749285), (35, 11099714), (70, 5549857), (71, 5471690), (142, 2735845), (355, 1094338), (497, 781670), (710, 547169), (994, 390835), (2485, 156334), (4970, 78167)]