21758555

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{97}}^1$

素因数の和:168

約数の個数: 64

約数和(自身を含む): 35562240

約数和(自身を除く): 13803685

約数列:

[1, 5, 7, 13, 17, 29, 35, 65, 85, 91, 97, 119, 145, 203, 221, 377, 455, 485, 493, 595, 679, 1015, 1105, 1261, 1547, 1649, 1885, 2465, 2639, 2813, 3395, 3451, 6305, 6409, 7735, 8245, 8827, 11543, 13195, 14065, 17255, 19691, 21437, 32045, 36569, 44135, 44863, 47821, 57715, 98455, 107185, 150059, 182845, 224315, 239105, 255983, 334747, 621673, 750295, 1279915, 1673735, 3108365, 4351711, 21758555]

約数ペア:

[(1, 21758555), (5, 4351711), (7, 3108365), (13, 1673735), (17, 1279915), (29, 750295), (35, 621673), (65, 334747), (85, 255983), (91, 239105), (97, 224315), (119, 182845), (145, 150059), (203, 107185), (221, 98455), (377, 57715), (455, 47821), (485, 44863), (493, 44135), (595, 36569), (679, 32045), (1015, 21437), (1105, 19691), (1261, 17255), (1547, 14065), (1649, 13195), (1885, 11543), (2465, 8827), (2639, 8245), (2813, 7735), (3395, 6409), (3451, 6305)]