18689840

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17971}}^1$

素因数の和:17997

約数の個数: 40

約数和(自身を含む): 46799088

約数和(自身を除く): 28109248

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 17971, 35942, 71884, 89855, 143768, 179710, 233623, 287536, 359420, 467246, 718840, 934492, 1168115, 1437680, 1868984, 2336230, 3737968, 4672460, 9344920, 18689840]

約数ペア:

[(1, 18689840), (2, 9344920), (4, 4672460), (5, 3737968), (8, 2336230), (10, 1868984), (13, 1437680), (16, 1168115), (20, 934492), (26, 718840), (40, 467246), (52, 359420), (65, 287536), (80, 233623), (104, 179710), (130, 143768), (208, 89855), (260, 71884), (520, 35942), (1040, 17971)]