781820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{97}}^1$

素因数の和:150

約数の個数: 48

約数和(自身を含む): 1843968

約数和(自身を除く): 1062148

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 52, 62, 65, 97, 124, 130, 155, 194, 260, 310, 388, 403, 485, 620, 806, 970, 1261, 1612, 1940, 2015, 2522, 3007, 4030, 5044, 6014, 6305, 8060, 12028, 12610, 15035, 25220, 30070, 39091, 60140, 78182, 156364, 195455, 390910, 781820]

約数ペア:

[(1, 781820), (2, 390910), (4, 195455), (5, 156364), (10, 78182), (13, 60140), (20, 39091), (26, 30070), (31, 25220), (52, 15035), (62, 12610), (65, 12028), (97, 8060), (124, 6305), (130, 6014), (155, 5044), (194, 4030), (260, 3007), (310, 2522), (388, 2015), (403, 1940), (485, 1612), (620, 1261), (806, 970)]