21215216

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{149}}^1\times {\mathrm{809}}^1$

素因数の和:977

約数の個数: 40

約数和(自身を含む): 45198000

約数和(自身を除く): 23982784

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 88, 149, 176, 298, 596, 809, 1192, 1618, 1639, 2384, 3236, 3278, 6472, 6556, 8899, 12944, 13112, 17798, 26224, 35596, 71192, 120541, 142384, 241082, 482164, 964328, 1325951, 1928656, 2651902, 5303804, 10607608, 21215216]

約数ペア:

[(1, 21215216), (2, 10607608), (4, 5303804), (8, 2651902), (11, 1928656), (16, 1325951), (22, 964328), (44, 482164), (88, 241082), (149, 142384), (176, 120541), (298, 71192), (596, 35596), (809, 26224), (1192, 17798), (1618, 13112), (1639, 12944), (2384, 8899), (3236, 6556), (3278, 6472)]