21204840

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{83}}^1\times {\mathrm{2129}}^1$

素因数の和:2226

約数の個数: 64

約数和(自身を含む): 64411200

約数和(自身を除く): 43206360

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 83, 120, 166, 249, 332, 415, 498, 664, 830, 996, 1245, 1660, 1992, 2129, 2490, 3320, 4258, 4980, 6387, 8516, 9960, 10645, 12774, 17032, 21290, 25548, 31935, 42580, 51096, 63870, 85160, 127740, 176707, 255480, 353414, 530121, 706828, 883535, 1060242, 1413656, 1767070, 2120484, 2650605, 3534140, 4240968, 5301210, 7068280, 10602420, 21204840]

約数ペア:

[(1, 21204840), (2, 10602420), (3, 7068280), (4, 5301210), (5, 4240968), (6, 3534140), (8, 2650605), (10, 2120484), (12, 1767070), (15, 1413656), (20, 1060242), (24, 883535), (30, 706828), (40, 530121), (60, 353414), (83, 255480), (120, 176707), (166, 127740), (249, 85160), (332, 63870), (415, 51096), (498, 42580), (664, 31935), (830, 25548), (996, 21290), (1245, 17032), (1660, 12774), (1992, 10645), (2129, 9960), (2490, 8516), (3320, 6387), (4258, 4980)]