19904788

素因数分解:

$2^2\times {\mathrm{29}}^2\times {\mathrm{61}}^1\times {\mathrm{97}}^1$

素因数の和:220

約数の個数: 36

約数和(自身を含む): 37045372

約数和(自身を除く): 17140584

約数列:

[1, 2, 4, 29, 58, 61, 97, 116, 122, 194, 244, 388, 841, 1682, 1769, 2813, 3364, 3538, 5626, 5917, 7076, 11252, 11834, 23668, 51301, 81577, 102602, 163154, 171593, 205204, 326308, 343186, 686372, 4976197, 9952394, 19904788]

約数ペア:

[(1, 19904788), (2, 9952394), (4, 4976197), (29, 686372), (58, 343186), (61, 326308), (97, 205204), (116, 171593), (122, 163154), (194, 102602), (244, 81577), (388, 51301), (841, 23668), (1682, 11834), (1769, 11252), (2813, 7076), (3364, 5917), (3538, 5626)]