206820920

素因数分解:

$2^3\times 5^1\times {\mathrm{163}}^1\times {\mathrm{31721}}^1$

素因数の和:31895

約数の個数: 32

約数和(自身を含む): 468216720

約数和(自身を除く): 261395800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 163, 326, 652, 815, 1304, 1630, 3260, 6520, 31721, 63442, 126884, 158605, 253768, 317210, 634420, 1268840, 5170523, 10341046, 20682092, 25852615, 41364184, 51705230, 103410460, 206820920]

約数ペア:

[(1, 206820920), (2, 103410460), (4, 51705230), (5, 41364184), (8, 25852615), (10, 20682092), (20, 10341046), (40, 5170523), (163, 1268840), (326, 634420), (652, 317210), (815, 253768), (1304, 158605), (1630, 126884), (3260, 63442), (6520, 31721)]