21132080

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8521}}^1$

素因数の和:8565

約数の個数: 40

約数和(自身を含む): 50722944

約数和(自身を除く): 29590864

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 8521, 17042, 34084, 42605, 68168, 85210, 136336, 170420, 264151, 340840, 528302, 681680, 1056604, 1320755, 2113208, 2641510, 4226416, 5283020, 10566040, 21132080]

約数ペア:

[(1, 21132080), (2, 10566040), (4, 5283020), (5, 4226416), (8, 2641510), (10, 2113208), (16, 1320755), (20, 1056604), (31, 681680), (40, 528302), (62, 340840), (80, 264151), (124, 170420), (155, 136336), (248, 85210), (310, 68168), (496, 42605), (620, 34084), (1240, 17042), (2480, 8521)]