18817840

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{3313}}^1$

素因数の和:3397

約数の個数: 40

約数和(自身を含む): 44381088

約数和(自身を除く): 25563248

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 142, 284, 355, 568, 710, 1136, 1420, 2840, 3313, 5680, 6626, 13252, 16565, 26504, 33130, 53008, 66260, 132520, 235223, 265040, 470446, 940892, 1176115, 1881784, 2352230, 3763568, 4704460, 9408920, 18817840]

約数ペア:

[(1, 18817840), (2, 9408920), (4, 4704460), (5, 3763568), (8, 2352230), (10, 1881784), (16, 1176115), (20, 940892), (40, 470446), (71, 265040), (80, 235223), (142, 132520), (284, 66260), (355, 53008), (568, 33130), (710, 26504), (1136, 16565), (1420, 13252), (2840, 6626), (3313, 5680)]