31540240

素因数分解:

$2^4\times 5^1\times {\mathrm{109}}^1\times {\mathrm{3617}}^1$

素因数の和:3739

約数の個数: 40

約数和(自身を含む): 74024280

約数和(自身を除く): 42484040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 109, 218, 436, 545, 872, 1090, 1744, 2180, 3617, 4360, 7234, 8720, 14468, 18085, 28936, 36170, 57872, 72340, 144680, 289360, 394253, 788506, 1577012, 1971265, 3154024, 3942530, 6308048, 7885060, 15770120, 31540240]

約数ペア:

[(1, 31540240), (2, 15770120), (4, 7885060), (5, 6308048), (8, 3942530), (10, 3154024), (16, 1971265), (20, 1577012), (40, 788506), (80, 394253), (109, 289360), (218, 144680), (436, 72340), (545, 57872), (872, 36170), (1090, 28936), (1744, 18085), (2180, 14468), (3617, 8720), (4360, 7234)]