21005062720

素因数分解:

$2^6\times 5^1\times {\mathrm{65640821}}^1$

素因数の和:65640838

約数の個数: 28

約数和(自身を含む): 50018306364

約数和(自身を除く): 29013243644

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 65640821, 131281642, 262563284, 328204105, 525126568, 656408210, 1050253136, 1312816420, 2100506272, 2625632840, 4201012544, 5251265680, 10502531360, 21005062720]

約数ペア:

[(1, 21005062720), (2, 10502531360), (4, 5251265680), (5, 4201012544), (8, 2625632840), (10, 2100506272), (16, 1312816420), (20, 1050253136), (32, 656408210), (40, 525126568), (64, 328204105), (80, 262563284), (160, 131281642), (320, 65640821)]