20791472

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{5261}}^1$

素因数の和:5301

約数の個数: 40

約数和(自身を含む): 45674160

約数和(自身を除く): 24882688

約数列:

[1, 2, 4, 8, 13, 16, 19, 26, 38, 52, 76, 104, 152, 208, 247, 304, 494, 988, 1976, 3952, 5261, 10522, 21044, 42088, 68393, 84176, 99959, 136786, 199918, 273572, 399836, 547144, 799672, 1094288, 1299467, 1599344, 2598934, 5197868, 10395736, 20791472]

約数ペア:

[(1, 20791472), (2, 10395736), (4, 5197868), (8, 2598934), (13, 1599344), (16, 1299467), (19, 1094288), (26, 799672), (38, 547144), (52, 399836), (76, 273572), (104, 199918), (152, 136786), (208, 99959), (247, 84176), (304, 68393), (494, 42088), (988, 21044), (1976, 10522), (3952, 5261)]