21811218

素因数分解:

$2^1\times 3^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{2311}}^1$

素因数の和:2351

約数の個数: 48

約数和(自身を含む): 51659328

約数和(自身を除く): 29848110

約数列:

[1, 2, 3, 6, 11, 13, 22, 26, 33, 39, 66, 78, 121, 143, 242, 286, 363, 429, 726, 858, 1573, 2311, 3146, 4622, 4719, 6933, 9438, 13866, 25421, 30043, 50842, 60086, 76263, 90129, 152526, 180258, 279631, 330473, 559262, 660946, 838893, 991419, 1677786, 1982838, 3635203, 7270406, 10905609, 21811218]

約数ペア:

[(1, 21811218), (2, 10905609), (3, 7270406), (6, 3635203), (11, 1982838), (13, 1677786), (22, 991419), (26, 838893), (33, 660946), (39, 559262), (66, 330473), (78, 279631), (121, 180258), (143, 152526), (242, 90129), (286, 76263), (363, 60086), (429, 50842), (726, 30043), (858, 25421), (1573, 13866), (2311, 9438), (3146, 6933), (4622, 4719)]