20890856

素因数分解:

$2^3\times 7^2\times {\mathrm{137}}^1\times {\mathrm{389}}^1$

素因数の和:546

約数の個数: 48

約数和(自身を含む): 46016100

約数和(自身を除く): 25125244

約数列:

[1, 2, 4, 7, 8, 14, 28, 49, 56, 98, 137, 196, 274, 389, 392, 548, 778, 959, 1096, 1556, 1918, 2723, 3112, 3836, 5446, 6713, 7672, 10892, 13426, 19061, 21784, 26852, 38122, 53293, 53704, 76244, 106586, 152488, 213172, 373051, 426344, 746102, 1492204, 2611357, 2984408, 5222714, 10445428, 20890856]

約数ペア:

[(1, 20890856), (2, 10445428), (4, 5222714), (7, 2984408), (8, 2611357), (14, 1492204), (28, 746102), (49, 426344), (56, 373051), (98, 213172), (137, 152488), (196, 106586), (274, 76244), (389, 53704), (392, 53293), (548, 38122), (778, 26852), (959, 21784), (1096, 19061), (1556, 13426), (1918, 10892), (2723, 7672), (3112, 6713), (3836, 5446)]