19972280

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{1277}}^1$

素因数の和:1328

約数の個数: 64

約数和(自身を含む): 49688640

約数和(自身を除く): 29716360

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 23, 34, 40, 46, 68, 85, 92, 115, 136, 170, 184, 230, 340, 391, 460, 680, 782, 920, 1277, 1564, 1955, 2554, 3128, 3910, 5108, 6385, 7820, 10216, 12770, 15640, 21709, 25540, 29371, 43418, 51080, 58742, 86836, 108545, 117484, 146855, 173672, 217090, 234968, 293710, 434180, 499307, 587420, 868360, 998614, 1174840, 1997228, 2496535, 3994456, 4993070, 9986140, 19972280]

約数ペア:

[(1, 19972280), (2, 9986140), (4, 4993070), (5, 3994456), (8, 2496535), (10, 1997228), (17, 1174840), (20, 998614), (23, 868360), (34, 587420), (40, 499307), (46, 434180), (68, 293710), (85, 234968), (92, 217090), (115, 173672), (136, 146855), (170, 117484), (184, 108545), (230, 86836), (340, 58742), (391, 51080), (460, 43418), (680, 29371), (782, 25540), (920, 21709), (1277, 15640), (1564, 12770), (1955, 10216), (2554, 7820), (3128, 6385), (3910, 5108)]