28941020

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1\times {\mathrm{229}}^1$

素因数の和:398

約数の個数: 48

約数和(自身を含む): 62596800

約数和(自身を除く): 33655780

約数列:

[1, 2, 4, 5, 10, 20, 71, 89, 142, 178, 229, 284, 355, 356, 445, 458, 710, 890, 916, 1145, 1420, 1780, 2290, 4580, 6319, 12638, 16259, 20381, 25276, 31595, 32518, 40762, 63190, 65036, 81295, 81524, 101905, 126380, 162590, 203810, 325180, 407620, 1447051, 2894102, 5788204, 7235255, 14470510, 28941020]

約数ペア:

[(1, 28941020), (2, 14470510), (4, 7235255), (5, 5788204), (10, 2894102), (20, 1447051), (71, 407620), (89, 325180), (142, 203810), (178, 162590), (229, 126380), (284, 101905), (355, 81524), (356, 81295), (445, 65036), (458, 63190), (710, 40762), (890, 32518), (916, 31595), (1145, 25276), (1420, 20381), (1780, 16259), (2290, 12638), (4580, 6319)]