20801540

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{193}}^1\times {\mathrm{317}}^1$

素因数の和:536

約数の個数: 48

約数和(自身を含む): 46639152

約数和(自身を除く): 25837612

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 193, 317, 340, 386, 634, 772, 965, 1268, 1585, 1930, 3170, 3281, 3860, 5389, 6340, 6562, 10778, 13124, 16405, 21556, 26945, 32810, 53890, 61181, 65620, 107780, 122362, 244724, 305905, 611810, 1040077, 1223620, 2080154, 4160308, 5200385, 10400770, 20801540]

約数ペア:

[(1, 20801540), (2, 10400770), (4, 5200385), (5, 4160308), (10, 2080154), (17, 1223620), (20, 1040077), (34, 611810), (68, 305905), (85, 244724), (170, 122362), (193, 107780), (317, 65620), (340, 61181), (386, 53890), (634, 32810), (772, 26945), (965, 21556), (1268, 16405), (1585, 13124), (1930, 10778), (3170, 6562), (3281, 6340), (3860, 5389)]