81816320

素因数分解:

$2^8\times 5^1\times {\mathrm{41}}^1\times {\mathrm{1559}}^1$

素因数の和:1621

約数の個数: 72

約数和(自身を含む): 200884320

約数和(自身を除く): 119068000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 64, 80, 82, 128, 160, 164, 205, 256, 320, 328, 410, 640, 656, 820, 1280, 1312, 1559, 1640, 2624, 3118, 3280, 5248, 6236, 6560, 7795, 10496, 12472, 13120, 15590, 24944, 26240, 31180, 49888, 52480, 62360, 63919, 99776, 124720, 127838, 199552, 249440, 255676, 319595, 399104, 498880, 511352, 639190, 997760, 1022704, 1278380, 1995520, 2045408, 2556760, 4090816, 5113520, 8181632, 10227040, 16363264, 20454080, 40908160, 81816320]

約数ペア:

[(1, 81816320), (2, 40908160), (4, 20454080), (5, 16363264), (8, 10227040), (10, 8181632), (16, 5113520), (20, 4090816), (32, 2556760), (40, 2045408), (41, 1995520), (64, 1278380), (80, 1022704), (82, 997760), (128, 639190), (160, 511352), (164, 498880), (205, 399104), (256, 319595), (320, 255676), (328, 249440), (410, 199552), (640, 127838), (656, 124720), (820, 99776), (1280, 63919), (1312, 62360), (1559, 52480), (1640, 49888), (2624, 31180), (3118, 26240), (3280, 24944), (5248, 15590), (6236, 13120), (6560, 12472), (7795, 10496)]