4077980

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{89}}^1$

素因数の和:206

約数の個数: 48

約数和(自身を含む): 9072000

約数和(自身を除く): 4994020

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 79, 89, 116, 145, 158, 178, 290, 316, 356, 395, 445, 580, 790, 890, 1580, 1780, 2291, 2581, 4582, 5162, 7031, 9164, 10324, 11455, 12905, 14062, 22910, 25810, 28124, 35155, 45820, 51620, 70310, 140620, 203899, 407798, 815596, 1019495, 2038990, 4077980]

約数ペア:

[(1, 4077980), (2, 2038990), (4, 1019495), (5, 815596), (10, 407798), (20, 203899), (29, 140620), (58, 70310), (79, 51620), (89, 45820), (116, 35155), (145, 28124), (158, 25810), (178, 22910), (290, 14062), (316, 12905), (356, 11455), (395, 10324), (445, 9164), (580, 7031), (790, 5162), (890, 4582), (1580, 2581), (1780, 2291)]