1809088520

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{637003}}^1$

素因数の和:637085

約数の個数: 32

約数和(自身を含む): 4127785920

約数和(自身を除く): 2318697400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 637003, 1274006, 2548012, 3185015, 5096024, 6370030, 12740060, 25480120, 45227213, 90454426, 180908852, 226136065, 361817704, 452272130, 904544260, 1809088520]

約数ペア:

[(1, 1809088520), (2, 904544260), (4, 452272130), (5, 361817704), (8, 226136065), (10, 180908852), (20, 90454426), (40, 45227213), (71, 25480120), (142, 12740060), (284, 6370030), (355, 5096024), (568, 3185015), (710, 2548012), (1420, 1274006), (2840, 637003)]