20256980

素因数分解:

$2^2\times 5^1\times {\mathrm{83}}^1\times {\mathrm{12203}}^1$

素因数の和:12295

約数の個数: 24

約数和(自身を含む): 43055712

約数和(自身を除く): 22798732

約数列:

[1, 2, 4, 5, 10, 20, 83, 166, 332, 415, 830, 1660, 12203, 24406, 48812, 61015, 122030, 244060, 1012849, 2025698, 4051396, 5064245, 10128490, 20256980]

約数ペア:

[(1, 20256980), (2, 10128490), (4, 5064245), (5, 4051396), (10, 2025698), (20, 1012849), (83, 244060), (166, 122030), (332, 61015), (415, 48812), (830, 24406), (1660, 12203)]