18985175

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1$

素因数の和:200

約数の個数: 48

約数和(自身を含む): 28283904

約数和(自身を除く): 9298729

約数列:

[1, 5, 11, 17, 25, 31, 55, 85, 131, 155, 187, 275, 341, 425, 527, 655, 775, 935, 1441, 1705, 2227, 2635, 3275, 4061, 4675, 5797, 7205, 8525, 11135, 13175, 20305, 24497, 28985, 36025, 44671, 55675, 69037, 101525, 122485, 144925, 223355, 345185, 612425, 759407, 1116775, 1725925, 3797035, 18985175]

約数ペア:

[(1, 18985175), (5, 3797035), (11, 1725925), (17, 1116775), (25, 759407), (31, 612425), (55, 345185), (85, 223355), (131, 144925), (155, 122485), (187, 101525), (275, 69037), (341, 55675), (425, 44671), (527, 36025), (655, 28985), (775, 24497), (935, 20305), (1441, 13175), (1705, 11135), (2227, 8525), (2635, 7205), (3275, 5797), (4061, 4675)]