31139960

素因数分解:

$2^3\times 5^1\times {\mathrm{541}}^1\times {\mathrm{1439}}^1$

素因数の和:1991

約数の個数: 32

約数和(自身を含む): 70243200

約数和(自身を除く): 39103240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 541, 1082, 1439, 2164, 2705, 2878, 4328, 5410, 5756, 7195, 10820, 11512, 14390, 21640, 28780, 57560, 778499, 1556998, 3113996, 3892495, 6227992, 7784990, 15569980, 31139960]

約数ペア:

[(1, 31139960), (2, 15569980), (4, 7784990), (5, 6227992), (8, 3892495), (10, 3113996), (20, 1556998), (40, 778499), (541, 57560), (1082, 28780), (1439, 21640), (2164, 14390), (2705, 11512), (2878, 10820), (4328, 7195), (5410, 5756)]