21815220

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{51941}}^1$

素因数の和:51960

約数の個数: 48

約数和(自身を含む): 69810048

約数和(自身を除く): 47994828

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 51941, 103882, 155823, 207764, 259705, 311646, 363587, 519410, 623292, 727174, 779115, 1038820, 1090761, 1454348, 1558230, 1817935, 2181522, 3116460, 3635870, 4363044, 5453805, 7271740, 10907610, 21815220]

約数ペア:

[(1, 21815220), (2, 10907610), (3, 7271740), (4, 5453805), (5, 4363044), (6, 3635870), (7, 3116460), (10, 2181522), (12, 1817935), (14, 1558230), (15, 1454348), (20, 1090761), (21, 1038820), (28, 779115), (30, 727174), (35, 623292), (42, 519410), (60, 363587), (70, 311646), (84, 259705), (105, 207764), (140, 155823), (210, 103882), (420, 51941)]