21000481520

素因数分解:

$2^4\times 5^1\times {\mathrm{79}}^1\times {\mathrm{3322861}}^1$

素因数の和:3322953

約数の個数: 40

約数和(自身を含む): 49444186560

約数和(自身を除く): 28443705040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 79, 80, 158, 316, 395, 632, 790, 1264, 1580, 3160, 6320, 3322861, 6645722, 13291444, 16614305, 26582888, 33228610, 53165776, 66457220, 132914440, 262506019, 265828880, 525012038, 1050024076, 1312530095, 2100048152, 2625060190, 4200096304, 5250120380, 10500240760, 21000481520]

約数ペア:

[(1, 21000481520), (2, 10500240760), (4, 5250120380), (5, 4200096304), (8, 2625060190), (10, 2100048152), (16, 1312530095), (20, 1050024076), (40, 525012038), (79, 265828880), (80, 262506019), (158, 132914440), (316, 66457220), (395, 53165776), (632, 33228610), (790, 26582888), (1264, 16614305), (1580, 13291444), (3160, 6645722), (6320, 3322861)]