21277112

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{139981}}^1$

素因数の和:140006

約数の個数: 16

約数和(自身を含む): 41994600

約数和(自身を除く): 20717488

約数列:

[1, 2, 4, 8, 19, 38, 76, 152, 139981, 279962, 559924, 1119848, 2659639, 5319278, 10638556, 21277112]

約数ペア:

[(1, 21277112), (2, 10638556), (4, 5319278), (8, 2659639), (19, 1119848), (38, 559924), (76, 279962), (152, 139981)]