21177457

素因数分解:

$7^2\times {\mathrm{19}}^1\times {\mathrm{23}}^2\times {\mathrm{43}}^1$

素因数の和:122

約数の個数: 36

約数和(自身を含む): 27738480

約数和(自身を除く): 6561023

約数列:

[1, 7, 19, 23, 43, 49, 133, 161, 301, 437, 529, 817, 931, 989, 1127, 2107, 3059, 3703, 5719, 6923, 10051, 18791, 21413, 22747, 25921, 40033, 48461, 70357, 131537, 159229, 432193, 492499, 920759, 1114603, 3025351, 21177457]

約数ペア:

[(1, 21177457), (7, 3025351), (19, 1114603), (23, 920759), (43, 492499), (49, 432193), (133, 159229), (161, 131537), (301, 70357), (437, 48461), (529, 40033), (817, 25921), (931, 22747), (989, 21413), (1127, 18791), (2107, 10051), (3059, 6923), (3703, 5719)]