19949540

素因数分解:

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

素因数の和:576

約数の個数: 36

約数和(自身を含む): 45280116

約数和(自身を除く): 25330576

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 277, 554, 1108, 1385, 2770, 3601, 5540, 7202, 14404, 18005, 36010, 72020, 76729, 153458, 306916, 383645, 767290, 997477, 1534580, 1994954, 3989908, 4987385, 9974770, 19949540]

約数ペア:

[(1, 19949540), (2, 9974770), (4, 4987385), (5, 3989908), (10, 1994954), (13, 1534580), (20, 997477), (26, 767290), (52, 383645), (65, 306916), (130, 153458), (260, 76729), (277, 72020), (554, 36010), (1108, 18005), (1385, 14404), (2770, 7202), (3601, 5540)]