20454080

素因数分解:

$2^6\times 5^1\times {\mathrm{41}}^1\times {\mathrm{1559}}^1$

素因数の和:1617

約数の個数: 56

約数和(自身を含む): 49926240

約数和(自身を除く): 29472160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 64, 80, 82, 160, 164, 205, 320, 328, 410, 656, 820, 1312, 1559, 1640, 2624, 3118, 3280, 6236, 6560, 7795, 12472, 13120, 15590, 24944, 31180, 49888, 62360, 63919, 99776, 124720, 127838, 249440, 255676, 319595, 498880, 511352, 639190, 1022704, 1278380, 2045408, 2556760, 4090816, 5113520, 10227040, 20454080]

約数ペア:

[(1, 20454080), (2, 10227040), (4, 5113520), (5, 4090816), (8, 2556760), (10, 2045408), (16, 1278380), (20, 1022704), (32, 639190), (40, 511352), (41, 498880), (64, 319595), (80, 255676), (82, 249440), (160, 127838), (164, 124720), (205, 99776), (320, 63919), (328, 62360), (410, 49888), (656, 31180), (820, 24944), (1312, 15590), (1559, 13120), (1640, 12472), (2624, 7795), (3118, 6560), (3280, 6236)]