12780920

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{251}}^1$

素因数の和:348

約数の個数: 64

約数和(自身を含む): 30844800

約数和(自身を除く): 18063880

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 67, 76, 95, 134, 152, 190, 251, 268, 335, 380, 502, 536, 670, 760, 1004, 1255, 1273, 1340, 2008, 2510, 2546, 2680, 4769, 5020, 5092, 6365, 9538, 10040, 10184, 12730, 16817, 19076, 23845, 25460, 33634, 38152, 47690, 50920, 67268, 84085, 95380, 134536, 168170, 190760, 319523, 336340, 639046, 672680, 1278092, 1597615, 2556184, 3195230, 6390460, 12780920]

約数ペア:

[(1, 12780920), (2, 6390460), (4, 3195230), (5, 2556184), (8, 1597615), (10, 1278092), (19, 672680), (20, 639046), (38, 336340), (40, 319523), (67, 190760), (76, 168170), (95, 134536), (134, 95380), (152, 84085), (190, 67268), (251, 50920), (268, 47690), (335, 38152), (380, 33634), (502, 25460), (536, 23845), (670, 19076), (760, 16817), (1004, 12730), (1255, 10184), (1273, 10040), (1340, 9538), (2008, 6365), (2510, 5092), (2546, 5020), (2680, 4769)]