21667760

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8737}}^1$

素因数の和:8781

約数の個数: 40

約数和(自身を含む): 52008576

約数和(自身を除く): 30340816

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 8737, 17474, 34948, 43685, 69896, 87370, 139792, 174740, 270847, 349480, 541694, 698960, 1083388, 1354235, 2166776, 2708470, 4333552, 5416940, 10833880, 21667760]

約数ペア:

[(1, 21667760), (2, 10833880), (4, 5416940), (5, 4333552), (8, 2708470), (10, 2166776), (16, 1354235), (20, 1083388), (31, 698960), (40, 541694), (62, 349480), (80, 270847), (124, 174740), (155, 139792), (248, 87370), (310, 69896), (496, 43685), (620, 34948), (1240, 17474), (2480, 8737)]