128792320

素因数分解:

$2^8\times 5^1\times {\mathrm{239}}^1\times {\mathrm{421}}^1$

素因数の和:681

約数の個数: 72

約数和(自身を含む): 310524480

約数和(自身を除く): 181732160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 239, 256, 320, 421, 478, 640, 842, 956, 1195, 1280, 1684, 1912, 2105, 2390, 3368, 3824, 4210, 4780, 6736, 7648, 8420, 9560, 13472, 15296, 16840, 19120, 26944, 30592, 33680, 38240, 53888, 61184, 67360, 76480, 100619, 107776, 134720, 152960, 201238, 269440, 305920, 402476, 503095, 538880, 804952, 1006190, 1609904, 2012380, 3219808, 4024760, 6439616, 8049520, 12879232, 16099040, 25758464, 32198080, 64396160, 128792320]

約数ペア:

[(1, 128792320), (2, 64396160), (4, 32198080), (5, 25758464), (8, 16099040), (10, 12879232), (16, 8049520), (20, 6439616), (32, 4024760), (40, 3219808), (64, 2012380), (80, 1609904), (128, 1006190), (160, 804952), (239, 538880), (256, 503095), (320, 402476), (421, 305920), (478, 269440), (640, 201238), (842, 152960), (956, 134720), (1195, 107776), (1280, 100619), (1684, 76480), (1912, 67360), (2105, 61184), (2390, 53888), (3368, 38240), (3824, 33680), (4210, 30592), (4780, 26944), (6736, 19120), (7648, 16840), (8420, 15296), (9560, 13472)]