21553720

素因数分解:

$2^3\times 5^1\times {\mathrm{569}}^1\times {\mathrm{947}}^1$

素因数の和:1527

約数の個数: 32

約数和(自身を含む): 48632400

約数和(自身を除く): 27078680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 569, 947, 1138, 1894, 2276, 2845, 3788, 4552, 4735, 5690, 7576, 9470, 11380, 18940, 22760, 37880, 538843, 1077686, 2155372, 2694215, 4310744, 5388430, 10776860, 21553720]

約数ペア:

[(1, 21553720), (2, 10776860), (4, 5388430), (5, 4310744), (8, 2694215), (10, 2155372), (20, 1077686), (40, 538843), (569, 37880), (947, 22760), (1138, 18940), (1894, 11380), (2276, 9470), (2845, 7576), (3788, 5690), (4552, 4735)]