20210905

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{1229}}^1$

素因数の和:1281

約数の個数: 32

約数和(自身を含む): 29756160

約数和(自身を除く): 9545255

約数列:

[1, 5, 11, 13, 23, 55, 65, 115, 143, 253, 299, 715, 1229, 1265, 1495, 3289, 6145, 13519, 15977, 16445, 28267, 67595, 79885, 141335, 175747, 310937, 367471, 878735, 1554685, 1837355, 4042181, 20210905]

約数ペア:

[(1, 20210905), (5, 4042181), (11, 1837355), (13, 1554685), (23, 878735), (55, 367471), (65, 310937), (115, 175747), (143, 141335), (253, 79885), (299, 67595), (715, 28267), (1229, 16445), (1265, 15977), (1495, 13519), (3289, 6145)]