21253744

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{179}}^1\times {\mathrm{181}}^1$

素因数の和:409

約数の個数: 40

約数和(自身を含む): 42653520

約数和(自身を除く): 21399776

約数列:

[1, 2, 4, 8, 16, 41, 82, 164, 179, 181, 328, 358, 362, 656, 716, 724, 1432, 1448, 2864, 2896, 7339, 7421, 14678, 14842, 29356, 29684, 32399, 58712, 59368, 64798, 117424, 118736, 129596, 259192, 518384, 1328359, 2656718, 5313436, 10626872, 21253744]

約数ペア:

[(1, 21253744), (2, 10626872), (4, 5313436), (8, 2656718), (16, 1328359), (41, 518384), (82, 259192), (164, 129596), (179, 118736), (181, 117424), (328, 64798), (358, 59368), (362, 58712), (656, 32399), (716, 29684), (724, 29356), (1432, 14842), (1448, 14678), (2864, 7421), (2896, 7339)]