21368464

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{5407}}^1$

素因数の和:5447

約数の個数: 40

約数和(自身を含む): 46941440

約数和(自身を除く): 25572976

約数列:

[1, 2, 4, 8, 13, 16, 19, 26, 38, 52, 76, 104, 152, 208, 247, 304, 494, 988, 1976, 3952, 5407, 10814, 21628, 43256, 70291, 86512, 102733, 140582, 205466, 281164, 410932, 562328, 821864, 1124656, 1335529, 1643728, 2671058, 5342116, 10684232, 21368464]

約数ペア:

[(1, 21368464), (2, 10684232), (4, 5342116), (8, 2671058), (13, 1643728), (16, 1335529), (19, 1124656), (26, 821864), (38, 562328), (52, 410932), (76, 281164), (104, 205466), (152, 140582), (208, 102733), (247, 86512), (304, 70291), (494, 43256), (988, 21628), (1976, 10814), (3952, 5407)]