19520235

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{1999}}^1$

素因数の和:2048

約数の個数: 48

約数和(自身を含む): 39936000

約数和(自身を除く): 20415765

約数列:

[1, 3, 5, 7, 9, 15, 21, 31, 35, 45, 63, 93, 105, 155, 217, 279, 315, 465, 651, 1085, 1395, 1953, 1999, 3255, 5997, 9765, 9995, 13993, 17991, 29985, 41979, 61969, 69965, 89955, 125937, 185907, 209895, 309845, 433783, 557721, 629685, 929535, 1301349, 2168915, 2788605, 3904047, 6506745, 19520235]

約数ペア:

[(1, 19520235), (3, 6506745), (5, 3904047), (7, 2788605), (9, 2168915), (15, 1301349), (21, 929535), (31, 629685), (35, 557721), (45, 433783), (63, 309845), (93, 209895), (105, 185907), (155, 125937), (217, 89955), (279, 69965), (315, 61969), (465, 41979), (651, 29985), (1085, 17991), (1395, 13993), (1953, 9995), (1999, 9765), (3255, 5997)]