218686520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{420551}}^1$

素因数の和:420575

約数の個数: 32

約数和(自身を含む): 529895520

約数和(自身を除く): 311209000

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 420551, 841102, 1682204, 2102755, 3364408, 4205510, 5467163, 8411020, 10934326, 16822040, 21868652, 27335815, 43737304, 54671630, 109343260, 218686520]

約数ペア:

[(1, 218686520), (2, 109343260), (4, 54671630), (5, 43737304), (8, 27335815), (10, 21868652), (13, 16822040), (20, 10934326), (26, 8411020), (40, 5467163), (52, 4205510), (65, 3364408), (104, 2102755), (130, 1682204), (260, 841102), (520, 420551)]