21075505

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{263}}^1$

素因数の和:357

約数の個数: 32

約数和(自身を含む): 29196288

約数和(自身を除く): 8120783

約数列:

[1, 5, 11, 31, 47, 55, 155, 235, 263, 341, 517, 1315, 1457, 1705, 2585, 2893, 7285, 8153, 12361, 14465, 16027, 40765, 61805, 80135, 89683, 135971, 383191, 448415, 679855, 1915955, 4215101, 21075505]

約数ペア:

[(1, 21075505), (5, 4215101), (11, 1915955), (31, 679855), (47, 448415), (55, 383191), (155, 135971), (235, 89683), (263, 80135), (341, 61805), (517, 40765), (1315, 16027), (1457, 14465), (1705, 12361), (2585, 8153), (2893, 7285)]