21136960

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{5081}}^1$

素因数の和:5111

約数の個数: 56

約数和(自身を含む): 54214776

約数和(自身を除く): 33077816

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 130, 160, 208, 260, 320, 416, 520, 832, 1040, 2080, 4160, 5081, 10162, 20324, 25405, 40648, 50810, 66053, 81296, 101620, 132106, 162592, 203240, 264212, 325184, 330265, 406480, 528424, 660530, 812960, 1056848, 1321060, 1625920, 2113696, 2642120, 4227392, 5284240, 10568480, 21136960]

約数ペア:

[(1, 21136960), (2, 10568480), (4, 5284240), (5, 4227392), (8, 2642120), (10, 2113696), (13, 1625920), (16, 1321060), (20, 1056848), (26, 812960), (32, 660530), (40, 528424), (52, 406480), (64, 330265), (65, 325184), (80, 264212), (104, 203240), (130, 162592), (160, 132106), (208, 101620), (260, 81296), (320, 66053), (416, 50810), (520, 40648), (832, 25405), (1040, 20324), (2080, 10162), (4160, 5081)]