20688540

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{499}}^1\times {\mathrm{691}}^1$

素因数の和:1202

約数の個数: 48

約数和(自身を含む): 58128000

約数和(自身を除く): 37439460

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 499, 691, 998, 1382, 1497, 1996, 2073, 2495, 2764, 2994, 3455, 4146, 4990, 5988, 6910, 7485, 8292, 9980, 10365, 13820, 14970, 20730, 29940, 41460, 344809, 689618, 1034427, 1379236, 1724045, 2068854, 3448090, 4137708, 5172135, 6896180, 10344270, 20688540]

約数ペア:

[(1, 20688540), (2, 10344270), (3, 6896180), (4, 5172135), (5, 4137708), (6, 3448090), (10, 2068854), (12, 1724045), (15, 1379236), (20, 1034427), (30, 689618), (60, 344809), (499, 41460), (691, 29940), (998, 20730), (1382, 14970), (1497, 13820), (1996, 10365), (2073, 9980), (2495, 8292), (2764, 7485), (2994, 6910), (3455, 5988), (4146, 4990)]