20740671985

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{31}}^2\times {\mathrm{1087}}^1$

素因数の和:1203

約数の個数: 72

約数和(自身を含む): 29637093888

約数和(自身を除く): 8896421903

約数列:

[1, 5, 11, 19, 31, 55, 95, 155, 209, 341, 361, 589, 961, 1045, 1087, 1705, 1805, 2945, 3971, 4805, 5435, 6479, 10571, 11191, 11957, 18259, 19855, 20653, 32395, 33697, 52855, 55955, 59785, 91295, 103265, 123101, 168485, 200849, 227183, 346921, 370667, 392407, 615505, 640243, 1004245, 1044607, 1135915, 1734605, 1853335, 1962035, 3201215, 3816131, 4316477, 5223035, 7042673, 11490677, 12164617, 19080655, 19847533, 21582385, 35213365, 57453385, 60823085, 99237665, 133810787, 218322863, 377103127, 669053935, 1091614315, 1885515635, 4148134397, 20740671985]

約数ペア:

[(1, 20740671985), (5, 4148134397), (11, 1885515635), (19, 1091614315), (31, 669053935), (55, 377103127), (95, 218322863), (155, 133810787), (209, 99237665), (341, 60823085), (361, 57453385), (589, 35213365), (961, 21582385), (1045, 19847533), (1087, 19080655), (1705, 12164617), (1805, 11490677), (2945, 7042673), (3971, 5223035), (4805, 4316477), (5435, 3816131), (6479, 3201215), (10571, 1962035), (11191, 1853335), (11957, 1734605), (18259, 1135915), (19855, 1044607), (20653, 1004245), (32395, 640243), (33697, 615505), (52855, 392407), (55955, 370667), (59785, 346921), (91295, 227183), (103265, 200849), (123101, 168485)]