21498790

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{211}}^1\times {\mathrm{443}}^1$

素因数の和:684

約数の個数: 32

約数和(自身を含む): 40663296

約数和(自身を除く): 19164506

約数列:

[1, 2, 5, 10, 23, 46, 115, 211, 230, 422, 443, 886, 1055, 2110, 2215, 4430, 4853, 9706, 10189, 20378, 24265, 48530, 50945, 93473, 101890, 186946, 467365, 934730, 2149879, 4299758, 10749395, 21498790]

約数ペア:

[(1, 21498790), (2, 10749395), (5, 4299758), (10, 2149879), (23, 934730), (46, 467365), (115, 186946), (211, 101890), (230, 93473), (422, 50945), (443, 48530), (886, 24265), (1055, 20378), (2110, 10189), (2215, 9706), (4430, 4853)]