81015680

素因数分解:

$2^7\times 5^1\times {\mathrm{103}}^1\times {\mathrm{1229}}^1$

素因数の和:1351

約数の個数: 64

約数和(自身を含む): 195717600

約数和(自身を除く): 114701920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 103, 128, 160, 206, 320, 412, 515, 640, 824, 1030, 1229, 1648, 2060, 2458, 3296, 4120, 4916, 6145, 6592, 8240, 9832, 12290, 13184, 16480, 19664, 24580, 32960, 39328, 49160, 65920, 78656, 98320, 126587, 157312, 196640, 253174, 393280, 506348, 632935, 786560, 1012696, 1265870, 2025392, 2531740, 4050784, 5063480, 8101568, 10126960, 16203136, 20253920, 40507840, 81015680]

約数ペア:

[(1, 81015680), (2, 40507840), (4, 20253920), (5, 16203136), (8, 10126960), (10, 8101568), (16, 5063480), (20, 4050784), (32, 2531740), (40, 2025392), (64, 1265870), (80, 1012696), (103, 786560), (128, 632935), (160, 506348), (206, 393280), (320, 253174), (412, 196640), (515, 157312), (640, 126587), (824, 98320), (1030, 78656), (1229, 65920), (1648, 49160), (2060, 39328), (2458, 32960), (3296, 24580), (4120, 19664), (4916, 16480), (6145, 13184), (6592, 12290), (8240, 9832)]