21658420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{2309}}^1$

素因数の和:2392

約数の個数: 48

約数和(自身を含む): 52778880

約数和(自身を除く): 31120460

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 67, 70, 134, 140, 268, 335, 469, 670, 938, 1340, 1876, 2309, 2345, 4618, 4690, 9236, 9380, 11545, 16163, 23090, 32326, 46180, 64652, 80815, 154703, 161630, 309406, 323260, 618812, 773515, 1082921, 1547030, 2165842, 3094060, 4331684, 5414605, 10829210, 21658420]

約数ペア:

[(1, 21658420), (2, 10829210), (4, 5414605), (5, 4331684), (7, 3094060), (10, 2165842), (14, 1547030), (20, 1082921), (28, 773515), (35, 618812), (67, 323260), (70, 309406), (134, 161630), (140, 154703), (268, 80815), (335, 64652), (469, 46180), (670, 32326), (938, 23090), (1340, 16163), (1876, 11545), (2309, 9380), (2345, 9236), (4618, 4690)]