20551635

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^2$

素因数の和:129

約数の個数: 72

約数和(自身を含む): 41343120

約数和(自身を除く): 20791485

約数列:

[1, 3, 5, 9, 13, 15, 19, 39, 43, 45, 57, 65, 95, 117, 129, 171, 195, 215, 247, 285, 387, 559, 585, 645, 741, 817, 855, 1235, 1677, 1849, 1935, 2223, 2451, 2795, 3705, 4085, 5031, 5547, 7353, 8385, 9245, 10621, 11115, 12255, 16641, 24037, 25155, 27735, 31863, 35131, 36765, 53105, 72111, 83205, 95589, 105393, 120185, 159315, 175655, 216333, 316179, 360555, 456703, 477945, 526965, 1081665, 1370109, 1580895, 2283515, 4110327, 6850545, 20551635]

約数ペア:

[(1, 20551635), (3, 6850545), (5, 4110327), (9, 2283515), (13, 1580895), (15, 1370109), (19, 1081665), (39, 526965), (43, 477945), (45, 456703), (57, 360555), (65, 316179), (95, 216333), (117, 175655), (129, 159315), (171, 120185), (195, 105393), (215, 95589), (247, 83205), (285, 72111), (387, 53105), (559, 36765), (585, 35131), (645, 31863), (741, 27735), (817, 25155), (855, 24037), (1235, 16641), (1677, 12255), (1849, 11115), (1935, 10621), (2223, 9245), (2451, 8385), (2795, 7353), (3705, 5547), (4085, 5031)]