398450

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{613}}^1$

素因数の和:638

約数の個数: 24

約数和(自身を含む): 799428

約数和(自身を除く): 400978

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 130, 325, 613, 650, 1226, 3065, 6130, 7969, 15325, 15938, 30650, 39845, 79690, 199225, 398450]

約数ペア:

[(1, 398450), (2, 199225), (5, 79690), (10, 39845), (13, 30650), (25, 15938), (26, 15325), (50, 7969), (65, 6130), (130, 3065), (325, 1226), (613, 650)]