19811205

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1$

素因数の和:123

約数の個数: 96

約数和(自身を含む): 40435200

約数和(自身を除く): 20623995

約数列:

[1, 3, 5, 9, 15, 17, 19, 29, 45, 47, 51, 57, 85, 87, 95, 141, 145, 153, 171, 235, 255, 261, 285, 323, 423, 435, 493, 551, 705, 765, 799, 855, 893, 969, 1305, 1363, 1479, 1615, 1653, 2115, 2397, 2465, 2679, 2755, 2907, 3995, 4089, 4437, 4465, 4845, 4959, 6815, 7191, 7395, 8037, 8265, 9367, 11985, 12267, 13395, 14535, 15181, 20445, 22185, 23171, 24795, 25897, 28101, 35955, 40185, 45543, 46835, 61335, 69513, 75905, 77691, 84303, 115855, 129485, 136629, 140505, 208539, 227715, 233073, 347565, 388455, 421515, 440249, 683145, 1042695, 1165365, 1320747, 2201245, 3962241, 6603735, 19811205]

約数ペア:

[(1, 19811205), (3, 6603735), (5, 3962241), (9, 2201245), (15, 1320747), (17, 1165365), (19, 1042695), (29, 683145), (45, 440249), (47, 421515), (51, 388455), (57, 347565), (85, 233073), (87, 227715), (95, 208539), (141, 140505), (145, 136629), (153, 129485), (171, 115855), (235, 84303), (255, 77691), (261, 75905), (285, 69513), (323, 61335), (423, 46835), (435, 45543), (493, 40185), (551, 35955), (705, 28101), (765, 25897), (799, 24795), (855, 23171), (893, 22185), (969, 20445), (1305, 15181), (1363, 14535), (1479, 13395), (1615, 12267), (1653, 11985), (2115, 9367), (2397, 8265), (2465, 8037), (2679, 7395), (2755, 7191), (2907, 6815), (3995, 4959), (4089, 4845), (4437, 4465)]