20531020

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{557}}^1$

素因数の和:682

約数の個数: 48

約数和(自身を含む): 45934560

約数和(自身を除く): 25403540

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 97, 190, 194, 380, 388, 485, 557, 970, 1114, 1843, 1940, 2228, 2785, 3686, 5570, 7372, 9215, 10583, 11140, 18430, 21166, 36860, 42332, 52915, 54029, 105830, 108058, 211660, 216116, 270145, 540290, 1026551, 1080580, 2053102, 4106204, 5132755, 10265510, 20531020]

約数ペア:

[(1, 20531020), (2, 10265510), (4, 5132755), (5, 4106204), (10, 2053102), (19, 1080580), (20, 1026551), (38, 540290), (76, 270145), (95, 216116), (97, 211660), (190, 108058), (194, 105830), (380, 54029), (388, 52915), (485, 42332), (557, 36860), (970, 21166), (1114, 18430), (1843, 11140), (1940, 10583), (2228, 9215), (2785, 7372), (3686, 5570)]