890407240

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{364921}}^1$

素因数の和:364993

約数の個数: 32

約数和(自身を含む): 2036264760

約数和(自身を除く): 1145857520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 364921, 729842, 1459684, 1824605, 2919368, 3649210, 7298420, 14596840, 22260181, 44520362, 89040724, 111300905, 178081448, 222601810, 445203620, 890407240]

約数ペア:

[(1, 890407240), (2, 445203620), (4, 222601810), (5, 178081448), (8, 111300905), (10, 89040724), (20, 44520362), (40, 22260181), (61, 14596840), (122, 7298420), (244, 3649210), (305, 2919368), (488, 1824605), (610, 1459684), (1220, 729842), (2440, 364921)]