81965440

素因数分解:

$2^7\times 5^1\times {\mathrm{89}}^1\times {\mathrm{1439}}^1$

素因数の和:1547

約数の個数: 64

約数和(自身を含む): 198288000

約数和(自身を除く): 116322560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 89, 128, 160, 178, 320, 356, 445, 640, 712, 890, 1424, 1439, 1780, 2848, 2878, 3560, 5696, 5756, 7120, 7195, 11392, 11512, 14240, 14390, 23024, 28480, 28780, 46048, 56960, 57560, 92096, 115120, 128071, 184192, 230240, 256142, 460480, 512284, 640355, 920960, 1024568, 1280710, 2049136, 2561420, 4098272, 5122840, 8196544, 10245680, 16393088, 20491360, 40982720, 81965440]

約数ペア:

[(1, 81965440), (2, 40982720), (4, 20491360), (5, 16393088), (8, 10245680), (10, 8196544), (16, 5122840), (20, 4098272), (32, 2561420), (40, 2049136), (64, 1280710), (80, 1024568), (89, 920960), (128, 640355), (160, 512284), (178, 460480), (320, 256142), (356, 230240), (445, 184192), (640, 128071), (712, 115120), (890, 92096), (1424, 57560), (1439, 56960), (1780, 46048), (2848, 28780), (2878, 28480), (3560, 23024), (5696, 14390), (5756, 14240), (7120, 11512), (7195, 11392)]