20563960

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{12539}}^1$

素因数の和:12591

約数の個数: 32

約数和(自身を含む): 47401200

約数和(自身を除く): 26837240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 12539, 25078, 50156, 62695, 100312, 125390, 250780, 501560, 514099, 1028198, 2056396, 2570495, 4112792, 5140990, 10281980, 20563960]

約数ペア:

[(1, 20563960), (2, 10281980), (4, 5140990), (5, 4112792), (8, 2570495), (10, 2056396), (20, 1028198), (40, 514099), (41, 501560), (82, 250780), (164, 125390), (205, 100312), (328, 62695), (410, 50156), (820, 25078), (1640, 12539)]