20121777

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{197}}^1$

素因数の和:319

約数の個数: 40

約数和(自身を含む): 32870376

約数和(自身を除く): 12748599

約数列:

[1, 3, 9, 13, 27, 39, 81, 97, 117, 197, 291, 351, 591, 873, 1053, 1261, 1773, 2561, 2619, 3783, 5319, 7683, 7857, 11349, 15957, 19109, 23049, 34047, 57327, 69147, 102141, 171981, 207441, 248417, 515943, 745251, 1547829, 2235753, 6707259, 20121777]

約数ペア:

[(1, 20121777), (3, 6707259), (9, 2235753), (13, 1547829), (27, 745251), (39, 515943), (81, 248417), (97, 207441), (117, 171981), (197, 102141), (291, 69147), (351, 57327), (591, 34047), (873, 23049), (1053, 19109), (1261, 15957), (1773, 11349), (2561, 7857), (2619, 7683), (3783, 5319)]