640965

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{173}}^1$

素因数の和:213

約数の個数: 32

約数和(自身を含む): 1169280

約数和(自身を除く): 528315

約数列:

[1, 3, 5, 13, 15, 19, 39, 57, 65, 95, 173, 195, 247, 285, 519, 741, 865, 1235, 2249, 2595, 3287, 3705, 6747, 9861, 11245, 16435, 33735, 42731, 49305, 128193, 213655, 640965]

約数ペア:

[(1, 640965), (3, 213655), (5, 128193), (13, 49305), (15, 42731), (19, 33735), (39, 16435), (57, 11245), (65, 9861), (95, 6747), (173, 3705), (195, 3287), (247, 2595), (285, 2249), (519, 1235), (741, 865)]