20931760

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{15391}}^1$

素因数の和:15421

約数の個数: 40

約数和(自身を含む): 51532416

約数和(自身を除く): 30600656

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 15391, 30782, 61564, 76955, 123128, 153910, 246256, 261647, 307820, 523294, 615640, 1046588, 1231280, 1308235, 2093176, 2616470, 4186352, 5232940, 10465880, 20931760]

約数ペア:

[(1, 20931760), (2, 10465880), (4, 5232940), (5, 4186352), (8, 2616470), (10, 2093176), (16, 1308235), (17, 1231280), (20, 1046588), (34, 615640), (40, 523294), (68, 307820), (80, 261647), (85, 246256), (136, 153910), (170, 123128), (272, 76955), (340, 61564), (680, 30782), (1360, 15391)]