21099160

素因数分解:

$2^3\times 5^1\times {\mathrm{557}}^1\times {\mathrm{947}}^1$

素因数の和:1515

約数の個数: 32

約数和(自身を含む): 47608560

約数和(自身を除く): 26509400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 557, 947, 1114, 1894, 2228, 2785, 3788, 4456, 4735, 5570, 7576, 9470, 11140, 18940, 22280, 37880, 527479, 1054958, 2109916, 2637395, 4219832, 5274790, 10549580, 21099160]

約数ペア:

[(1, 21099160), (2, 10549580), (4, 5274790), (5, 4219832), (8, 2637395), (10, 2109916), (20, 1054958), (40, 527479), (557, 37880), (947, 22280), (1114, 18940), (1894, 11140), (2228, 9470), (2785, 7576), (3788, 5570), (4456, 4735)]