30721520

素因数分解:

$2^4\times 5^1\times {\mathrm{79}}^1\times {\mathrm{4861}}^1$

素因数の和:4953

約数の個数: 40

約数和(自身を含む): 72346560

約数和(自身を除く): 41625040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 79, 80, 158, 316, 395, 632, 790, 1264, 1580, 3160, 4861, 6320, 9722, 19444, 24305, 38888, 48610, 77776, 97220, 194440, 384019, 388880, 768038, 1536076, 1920095, 3072152, 3840190, 6144304, 7680380, 15360760, 30721520]

約数ペア:

[(1, 30721520), (2, 15360760), (4, 7680380), (5, 6144304), (8, 3840190), (10, 3072152), (16, 1920095), (20, 1536076), (40, 768038), (79, 388880), (80, 384019), (158, 194440), (316, 97220), (395, 77776), (632, 48610), (790, 38888), (1264, 24305), (1580, 19444), (3160, 9722), (4861, 6320)]