20973340

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{569}}^1$

素因数の和:694

約数の個数: 48

約数和(自身を含む): 46922400

約数和(自身を除く): 25949060

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 97, 190, 194, 380, 388, 485, 569, 970, 1138, 1843, 1940, 2276, 2845, 3686, 5690, 7372, 9215, 10811, 11380, 18430, 21622, 36860, 43244, 54055, 55193, 108110, 110386, 216220, 220772, 275965, 551930, 1048667, 1103860, 2097334, 4194668, 5243335, 10486670, 20973340]

約数ペア:

[(1, 20973340), (2, 10486670), (4, 5243335), (5, 4194668), (10, 2097334), (19, 1103860), (20, 1048667), (38, 551930), (76, 275965), (95, 220772), (97, 216220), (190, 110386), (194, 108110), (380, 55193), (388, 54055), (485, 43244), (569, 36860), (970, 21622), (1138, 18430), (1843, 11380), (1940, 10811), (2276, 9215), (2845, 7372), (3686, 5690)]