20955645

素因数分解:

$3^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{397}}^1$

素因数の和:451

約数の個数: 64

約数和(自身を含む): 41264640

約数和(自身を除く): 20308995

約数列:

[1, 3, 5, 9, 15, 17, 23, 27, 45, 51, 69, 85, 115, 135, 153, 207, 255, 345, 391, 397, 459, 621, 765, 1035, 1173, 1191, 1955, 1985, 2295, 3105, 3519, 3573, 5865, 5955, 6749, 9131, 10557, 10719, 17595, 17865, 20247, 27393, 33745, 45655, 52785, 53595, 60741, 82179, 101235, 136965, 155227, 182223, 246537, 303705, 410895, 465681, 776135, 911115, 1232685, 1397043, 2328405, 4191129, 6985215, 20955645]

約数ペア:

[(1, 20955645), (3, 6985215), (5, 4191129), (9, 2328405), (15, 1397043), (17, 1232685), (23, 911115), (27, 776135), (45, 465681), (51, 410895), (69, 303705), (85, 246537), (115, 182223), (135, 155227), (153, 136965), (207, 101235), (255, 82179), (345, 60741), (391, 53595), (397, 52785), (459, 45655), (621, 33745), (765, 27393), (1035, 20247), (1173, 17865), (1191, 17595), (1955, 10719), (1985, 10557), (2295, 9131), (3105, 6749), (3519, 5955), (3573, 5865)]