129215740

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{90997}}^1$

素因数の和:91077

約数の個数: 24

約数和(自身を含む): 275177952

約数和(自身を除く): 145962212

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 90997, 181994, 363988, 454985, 909970, 1819940, 6460787, 12921574, 25843148, 32303935, 64607870, 129215740]

約数ペア:

[(1, 129215740), (2, 64607870), (4, 32303935), (5, 25843148), (10, 12921574), (20, 6460787), (71, 1819940), (142, 909970), (284, 454985), (355, 363988), (710, 181994), (1420, 90997)]