15721081990

素因数分解:

$2^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{109}}^1\times {\mathrm{203141}}^1$

素因数の和:203328

約数の個数: 32

約数和(自身を含む): 28959923520

約数和(自身を除く): 13238841530

約数列:

[1, 2, 5, 10, 71, 109, 142, 218, 355, 545, 710, 1090, 7739, 15478, 38695, 77390, 203141, 406282, 1015705, 2031410, 14423011, 22142369, 28846022, 44284738, 72115055, 110711845, 144230110, 221423690, 1572108199, 3144216398, 7860540995, 15721081990]

約数ペア:

[(1, 15721081990), (2, 7860540995), (5, 3144216398), (10, 1572108199), (71, 221423690), (109, 144230110), (142, 110711845), (218, 72115055), (355, 44284738), (545, 28846022), (710, 22142369), (1090, 14423011), (7739, 2031410), (15478, 1015705), (38695, 406282), (77390, 203141)]