21812778

素因数分解:

$2^1\times 3^2\times {\mathrm{13}}^1\times {\mathrm{31}}^2\times {\mathrm{97}}^1$

素因数の和:180

約数の個数: 72

約数和(自身を含む): 53133444

約数和(自身を除く): 31320666

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 31, 39, 62, 78, 93, 97, 117, 186, 194, 234, 279, 291, 403, 558, 582, 806, 873, 961, 1209, 1261, 1746, 1922, 2418, 2522, 2883, 3007, 3627, 3783, 5766, 6014, 7254, 7566, 8649, 9021, 11349, 12493, 17298, 18042, 22698, 24986, 27063, 37479, 39091, 54126, 74958, 78182, 93217, 112437, 117273, 186434, 224874, 234546, 279651, 351819, 559302, 703638, 838953, 1211821, 1677906, 2423642, 3635463, 7270926, 10906389, 21812778]

約数ペア:

[(1, 21812778), (2, 10906389), (3, 7270926), (6, 3635463), (9, 2423642), (13, 1677906), (18, 1211821), (26, 838953), (31, 703638), (39, 559302), (62, 351819), (78, 279651), (93, 234546), (97, 224874), (117, 186434), (186, 117273), (194, 112437), (234, 93217), (279, 78182), (291, 74958), (403, 54126), (558, 39091), (582, 37479), (806, 27063), (873, 24986), (961, 22698), (1209, 18042), (1261, 17298), (1746, 12493), (1922, 11349), (2418, 9021), (2522, 8649), (2883, 7566), (3007, 7254), (3627, 6014), (3783, 5766)]