21978275

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{229}}^1\times {\mathrm{349}}^1$

素因数の和:599

約数の個数: 24

約数和(自身を含む): 29946000

約数和(自身を除く): 7967725

約数列:

[1, 5, 11, 25, 55, 229, 275, 349, 1145, 1745, 2519, 3839, 5725, 8725, 12595, 19195, 62975, 79921, 95975, 399605, 879131, 1998025, 4395655, 21978275]

約数ペア:

[(1, 21978275), (5, 4395655), (11, 1998025), (25, 879131), (55, 399605), (229, 95975), (275, 79921), (349, 62975), (1145, 19195), (1745, 12595), (2519, 8725), (3839, 5725)]