64656520

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{37591}}^1$

素因数の和:37645

約数の個数: 32

約数和(自身を含む): 148864320

約数和(自身を除く): 84207800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 37591, 75182, 150364, 187955, 300728, 375910, 751820, 1503640, 1616413, 3232826, 6465652, 8082065, 12931304, 16164130, 32328260, 64656520]

約数ペア:

[(1, 64656520), (2, 32328260), (4, 16164130), (5, 12931304), (8, 8082065), (10, 6465652), (20, 3232826), (40, 1616413), (43, 1503640), (86, 751820), (172, 375910), (215, 300728), (344, 187955), (430, 150364), (860, 75182), (1720, 37591)]