20906515

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{857}}^1$

素因数の和:927

約数の個数: 32

約数和(自身を含む): 31135104

約数和(自身を除く): 10228589

約数列:

[1, 5, 7, 17, 35, 41, 85, 119, 205, 287, 595, 697, 857, 1435, 3485, 4285, 4879, 5999, 14569, 24395, 29995, 35137, 72845, 101983, 175685, 245959, 509915, 597329, 1229795, 2986645, 4181303, 20906515]

約数ペア:

[(1, 20906515), (5, 4181303), (7, 2986645), (17, 1229795), (35, 597329), (41, 509915), (85, 245959), (119, 175685), (205, 101983), (287, 72845), (595, 35137), (697, 29995), (857, 24395), (1435, 14569), (3485, 5999), (4285, 4879)]