71983990

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{277}}^1\times {\mathrm{1999}}^1$

素因数の和:2296

約数の個数: 32

約数和(自身を含む): 140112000

約数和(自身を除く): 68128010

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 277, 554, 1385, 1999, 2770, 3601, 3998, 7202, 9995, 18005, 19990, 25987, 36010, 51974, 129935, 259870, 553723, 1107446, 2768615, 5537230, 7198399, 14396798, 35991995, 71983990]

約数ペア:

[(1, 71983990), (2, 35991995), (5, 14396798), (10, 7198399), (13, 5537230), (26, 2768615), (65, 1107446), (130, 553723), (277, 259870), (554, 129935), (1385, 51974), (1999, 36010), (2770, 25987), (3601, 19990), (3998, 18005), (7202, 9995)]