20321895

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{137}}^1$

素因数の和:216

約数の個数: 64

約数和(自身を含む): 38154240

約数和(自身を除く): 17832345

約数列:

[1, 3, 5, 11, 15, 29, 31, 33, 55, 87, 93, 137, 145, 155, 165, 319, 341, 411, 435, 465, 685, 899, 957, 1023, 1507, 1595, 1705, 2055, 2697, 3973, 4247, 4495, 4521, 4785, 5115, 7535, 9889, 11919, 12741, 13485, 19865, 21235, 22605, 29667, 43703, 46717, 49445, 59595, 63705, 123163, 131109, 140151, 148335, 218515, 233585, 369489, 615815, 655545, 700755, 1354793, 1847445, 4064379, 6773965, 20321895]

約数ペア:

[(1, 20321895), (3, 6773965), (5, 4064379), (11, 1847445), (15, 1354793), (29, 700755), (31, 655545), (33, 615815), (55, 369489), (87, 233585), (93, 218515), (137, 148335), (145, 140151), (155, 131109), (165, 123163), (319, 63705), (341, 59595), (411, 49445), (435, 46717), (465, 43703), (685, 29667), (899, 22605), (957, 21235), (1023, 19865), (1507, 13485), (1595, 12741), (1705, 11919), (2055, 9889), (2697, 7535), (3973, 5115), (4247, 4785), (4495, 4521)]