20178275

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{1321}}^1$

素因数の和:1391

約数の個数: 24

約数和(自身を含む): 27539904

約数和(自身を除く): 7361629

約数列:

[1, 5, 13, 25, 47, 65, 235, 325, 611, 1175, 1321, 3055, 6605, 15275, 17173, 33025, 62087, 85865, 310435, 429325, 807131, 1552175, 4035655, 20178275]

約数ペア:

[(1, 20178275), (5, 4035655), (13, 1552175), (25, 807131), (47, 429325), (65, 310435), (235, 85865), (325, 62087), (611, 33025), (1175, 17173), (1321, 15275), (3055, 6605)]