21424725

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{223}}^1$

素因数の和:307

約数の個数: 72

約数和(自身を含む): 44774912

約数和(自身を除く): 23350187

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 45, 61, 63, 75, 105, 175, 183, 223, 225, 305, 315, 427, 525, 549, 669, 915, 1115, 1281, 1525, 1561, 1575, 2007, 2135, 2745, 3345, 3843, 4575, 4683, 5575, 6405, 7805, 10035, 10675, 13603, 13725, 14049, 16725, 19215, 23415, 32025, 39025, 40809, 50175, 68015, 70245, 95221, 96075, 117075, 122427, 204045, 285663, 340075, 351225, 476105, 612135, 856989, 1020225, 1428315, 2380525, 3060675, 4284945, 7141575, 21424725]

約数ペア:

[(1, 21424725), (3, 7141575), (5, 4284945), (7, 3060675), (9, 2380525), (15, 1428315), (21, 1020225), (25, 856989), (35, 612135), (45, 476105), (61, 351225), (63, 340075), (75, 285663), (105, 204045), (175, 122427), (183, 117075), (223, 96075), (225, 95221), (305, 70245), (315, 68015), (427, 50175), (525, 40809), (549, 39025), (669, 32025), (915, 23415), (1115, 19215), (1281, 16725), (1525, 14049), (1561, 13725), (1575, 13603), (2007, 10675), (2135, 10035), (2745, 7805), (3345, 6405), (3843, 5575), (4575, 4683)]