20809720

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{11069}}^1$

素因数の和:11127

約数の個数: 32

約数和(自身を含む): 47822400

約数和(自身を除く): 27012680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 94, 188, 235, 376, 470, 940, 1880, 11069, 22138, 44276, 55345, 88552, 110690, 221380, 442760, 520243, 1040486, 2080972, 2601215, 4161944, 5202430, 10404860, 20809720]

約数ペア:

[(1, 20809720), (2, 10404860), (4, 5202430), (5, 4161944), (8, 2601215), (10, 2080972), (20, 1040486), (40, 520243), (47, 442760), (94, 221380), (188, 110690), (235, 88552), (376, 55345), (470, 44276), (940, 22138), (1880, 11069)]