21720276

素因数分解:

$2^2\times 3^2\times {\mathrm{547}}^1\times {\mathrm{1103}}^1$

素因数の和:1660

約数の個数: 36

約数和(自身を含む): 55054272

約数和(自身を除く): 33333996

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 547, 1094, 1103, 1641, 2188, 2206, 3282, 3309, 4412, 4923, 6564, 6618, 9846, 9927, 13236, 19692, 19854, 39708, 603341, 1206682, 1810023, 2413364, 3620046, 5430069, 7240092, 10860138, 21720276]

約数ペア:

[(1, 21720276), (2, 10860138), (3, 7240092), (4, 5430069), (6, 3620046), (9, 2413364), (12, 1810023), (18, 1206682), (36, 603341), (547, 39708), (1094, 19854), (1103, 19692), (1641, 13236), (2188, 9927), (2206, 9846), (3282, 6618), (3309, 6564), (4412, 4923)]