20654235

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1$

素因数の和:90

約数の個数: 144

約数和(自身を含む): 48016800

約数和(自身を除く): 27362565

約数列:

[1, 3, 5, 7, 9, 15, 17, 19, 21, 29, 35, 45, 49, 51, 57, 63, 85, 87, 95, 105, 119, 133, 145, 147, 153, 171, 203, 245, 255, 261, 285, 315, 323, 357, 399, 435, 441, 493, 551, 595, 609, 665, 735, 765, 833, 855, 931, 969, 1015, 1071, 1197, 1305, 1421, 1479, 1615, 1653, 1785, 1827, 1995, 2205, 2261, 2465, 2499, 2755, 2793, 2907, 3045, 3451, 3857, 4165, 4263, 4437, 4655, 4845, 4959, 5355, 5985, 6783, 7105, 7395, 7497, 8265, 8379, 9135, 9367, 10353, 11305, 11571, 12495, 12789, 13965, 14535, 15827, 17255, 19285, 20349, 21315, 22185, 24157, 24795, 26999, 28101, 31059, 33915, 34713, 37485, 41895, 46835, 47481, 51765, 57855, 63945, 65569, 72471, 79135, 80997, 84303, 101745, 120785, 134995, 140505, 142443, 155295, 173565, 196707, 217413, 237405, 242991, 327845, 362355, 404985, 421515, 458983, 590121, 712215, 983535, 1087065, 1214955, 1376949, 2294915, 2950605, 4130847, 6884745, 20654235]

約数ペア:

[(1, 20654235), (3, 6884745), (5, 4130847), (7, 2950605), (9, 2294915), (15, 1376949), (17, 1214955), (19, 1087065), (21, 983535), (29, 712215), (35, 590121), (45, 458983), (49, 421515), (51, 404985), (57, 362355), (63, 327845), (85, 242991), (87, 237405), (95, 217413), (105, 196707), (119, 173565), (133, 155295), (145, 142443), (147, 140505), (153, 134995), (171, 120785), (203, 101745), (245, 84303), (255, 80997), (261, 79135), (285, 72471), (315, 65569), (323, 63945), (357, 57855), (399, 51765), (435, 47481), (441, 46835), (493, 41895), (551, 37485), (595, 34713), (609, 33915), (665, 31059), (735, 28101), (765, 26999), (833, 24795), (855, 24157), (931, 22185), (969, 21315), (1015, 20349), (1071, 19285), (1197, 17255), (1305, 15827), (1421, 14535), (1479, 13965), (1615, 12789), (1653, 12495), (1785, 11571), (1827, 11305), (1995, 10353), (2205, 9367), (2261, 9135), (2465, 8379), (2499, 8265), (2755, 7497), (2793, 7395), (2907, 7105), (3045, 6783), (3451, 5985), (3857, 5355), (4165, 4959), (4263, 4845), (4437, 4655)]