28210775

素因数分解:

$5^2\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{409}}^1$

素因数の和:539

約数の個数: 24

約数和(自身を含む): 36604800

約数和(自身を除く): 8394025

約数列:

[1, 5, 25, 31, 89, 155, 409, 445, 775, 2045, 2225, 2759, 10225, 12679, 13795, 36401, 63395, 68975, 182005, 316975, 910025, 1128431, 5642155, 28210775]

約数ペア:

[(1, 28210775), (5, 5642155), (25, 1128431), (31, 910025), (89, 316975), (155, 182005), (409, 68975), (445, 63395), (775, 36401), (2045, 13795), (2225, 12679), (2759, 10225)]