31181020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{2789}}^1$

素因数の和:2854

約数の個数: 48

約数和(自身を含む): 72182880

約数和(自身を除く): 41001860

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 43, 52, 65, 86, 130, 172, 215, 260, 430, 559, 860, 1118, 2236, 2789, 2795, 5578, 5590, 11156, 11180, 13945, 27890, 36257, 55780, 72514, 119927, 145028, 181285, 239854, 362570, 479708, 599635, 725140, 1199270, 1559051, 2398540, 3118102, 6236204, 7795255, 15590510, 31181020]

約数ペア:

[(1, 31181020), (2, 15590510), (4, 7795255), (5, 6236204), (10, 3118102), (13, 2398540), (20, 1559051), (26, 1199270), (43, 725140), (52, 599635), (65, 479708), (86, 362570), (130, 239854), (172, 181285), (215, 145028), (260, 119927), (430, 72514), (559, 55780), (860, 36257), (1118, 27890), (2236, 13945), (2789, 11180), (2795, 11156), (5578, 5590)]