31969990

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{7933}}^1$

素因数の和:7984

約数の個数: 32

約数和(自身を含む): 63979776

約数和(自身を除く): 32009786

約数列:

[1, 2, 5, 10, 13, 26, 31, 62, 65, 130, 155, 310, 403, 806, 2015, 4030, 7933, 15866, 39665, 79330, 103129, 206258, 245923, 491846, 515645, 1031290, 1229615, 2459230, 3196999, 6393998, 15984995, 31969990]

約数ペア:

[(1, 31969990), (2, 15984995), (5, 6393998), (10, 3196999), (13, 2459230), (26, 1229615), (31, 1031290), (62, 515645), (65, 491846), (130, 245923), (155, 206258), (310, 103129), (403, 79330), (806, 39665), (2015, 15866), (4030, 7933)]