405880

素因数分解:

$2^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{139}}^1$

素因数の和:223

約数の個数: 32

約数和(自身を含む): 932400

約数和(自身を除く): 526520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 73, 139, 146, 278, 292, 365, 556, 584, 695, 730, 1112, 1390, 1460, 2780, 2920, 5560, 10147, 20294, 40588, 50735, 81176, 101470, 202940, 405880]

約数ペア:

[(1, 405880), (2, 202940), (4, 101470), (5, 81176), (8, 50735), (10, 40588), (20, 20294), (40, 10147), (73, 5560), (139, 2920), (146, 2780), (278, 1460), (292, 1390), (365, 1112), (556, 730), (584, 695)]