20910995

素因数分解:

$5^1\times 7^3\times {\mathrm{89}}^1\times {\mathrm{137}}^1$

素因数の和:252

約数の個数: 32

約数和(自身を含む): 29808000

約数和(自身を除く): 8897005

約数列:

[1, 5, 7, 35, 49, 89, 137, 245, 343, 445, 623, 685, 959, 1715, 3115, 4361, 4795, 6713, 12193, 21805, 30527, 33565, 46991, 60965, 85351, 152635, 234955, 426755, 597457, 2987285, 4182199, 20910995]

約数ペア:

[(1, 20910995), (5, 4182199), (7, 2987285), (35, 597457), (49, 426755), (89, 234955), (137, 152635), (245, 85351), (343, 60965), (445, 46991), (623, 33565), (685, 30527), (959, 21805), (1715, 12193), (3115, 6713), (4361, 4795)]