12991825

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{397}}^1$

素因数の和:442

約数の個数: 48

約数和(自身を含む): 21320064

約数和(自身を除く): 8328239

約数列:

[1, 5, 7, 11, 17, 25, 35, 55, 77, 85, 119, 175, 187, 275, 385, 397, 425, 595, 935, 1309, 1925, 1985, 2779, 2975, 4367, 4675, 6545, 6749, 9925, 13895, 21835, 30569, 32725, 33745, 47243, 69475, 74239, 109175, 152845, 168725, 236215, 371195, 519673, 764225, 1181075, 1855975, 2598365, 12991825]

約数ペア:

[(1, 12991825), (5, 2598365), (7, 1855975), (11, 1181075), (17, 764225), (25, 519673), (35, 371195), (55, 236215), (77, 168725), (85, 152845), (119, 109175), (175, 74239), (187, 69475), (275, 47243), (385, 33745), (397, 32725), (425, 30569), (595, 21835), (935, 13895), (1309, 9925), (1925, 6749), (1985, 6545), (2779, 4675), (2975, 4367)]