665991820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{103}}^1\times {\mathrm{1913}}^1$

素因数の和:2051

約数の個数: 72

約数和(自身を含む): 1529944416

約数和(自身を除く): 863952596

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 103, 130, 169, 206, 260, 338, 412, 515, 676, 845, 1030, 1339, 1690, 1913, 2060, 2678, 3380, 3826, 5356, 6695, 7652, 9565, 13390, 17407, 19130, 24869, 26780, 34814, 38260, 49738, 69628, 87035, 99476, 124345, 174070, 197039, 248690, 323297, 348140, 394078, 497380, 646594, 788156, 985195, 1293188, 1616485, 1970390, 2561507, 3232970, 3940780, 5123014, 6465940, 10246028, 12807535, 25615070, 33299591, 51230140, 66599182, 133198364, 166497955, 332995910, 665991820]

約数ペア:

[(1, 665991820), (2, 332995910), (4, 166497955), (5, 133198364), (10, 66599182), (13, 51230140), (20, 33299591), (26, 25615070), (52, 12807535), (65, 10246028), (103, 6465940), (130, 5123014), (169, 3940780), (206, 3232970), (260, 2561507), (338, 1970390), (412, 1616485), (515, 1293188), (676, 985195), (845, 788156), (1030, 646594), (1339, 497380), (1690, 394078), (1913, 348140), (2060, 323297), (2678, 248690), (3380, 197039), (3826, 174070), (5356, 124345), (6695, 99476), (7652, 87035), (9565, 69628), (13390, 49738), (17407, 38260), (19130, 34814), (24869, 26780)]