20789470

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{409}}^1$

素因数の和:469

約数の個数: 64

約数和(自身を含む): 44634240

約数和(自身を除く): 23844770

約数列:

[1, 2, 5, 10, 13, 17, 23, 26, 34, 46, 65, 85, 115, 130, 170, 221, 230, 299, 391, 409, 442, 598, 782, 818, 1105, 1495, 1955, 2045, 2210, 2990, 3910, 4090, 5083, 5317, 6953, 9407, 10166, 10634, 13906, 18814, 25415, 26585, 34765, 47035, 50830, 53170, 69530, 90389, 94070, 122291, 159919, 180778, 244582, 319838, 451945, 611455, 799595, 903890, 1222910, 1599190, 2078947, 4157894, 10394735, 20789470]

約数ペア:

[(1, 20789470), (2, 10394735), (5, 4157894), (10, 2078947), (13, 1599190), (17, 1222910), (23, 903890), (26, 799595), (34, 611455), (46, 451945), (65, 319838), (85, 244582), (115, 180778), (130, 159919), (170, 122291), (221, 94070), (230, 90389), (299, 69530), (391, 53170), (409, 50830), (442, 47035), (598, 34765), (782, 26585), (818, 25415), (1105, 18814), (1495, 13906), (1955, 10634), (2045, 10166), (2210, 9407), (2990, 6953), (3910, 5317), (4090, 5083)]