21072415

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{1597}}^1$

素因数の和:1651

約数の個数: 32

約数和(自身を含む): 32215680

約数和(自身を除く): 11143265

約数列:

[1, 5, 7, 13, 29, 35, 65, 91, 145, 203, 377, 455, 1015, 1597, 1885, 2639, 7985, 11179, 13195, 20761, 46313, 55895, 103805, 145327, 231565, 324191, 602069, 726635, 1620955, 3010345, 4214483, 21072415]

約数ペア:

[(1, 21072415), (5, 4214483), (7, 3010345), (13, 1620955), (29, 726635), (35, 602069), (65, 324191), (91, 231565), (145, 145327), (203, 103805), (377, 55895), (455, 46313), (1015, 20761), (1597, 13195), (1885, 11179), (2639, 7985)]