18857025

素因数分解:

$3^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{401}}^1$

素因数の和:447

約数の個数: 72

約数和(自身を含む): 38881440

約数和(自身を除く): 20024415

約数列:

[1, 3, 5, 9, 11, 15, 19, 25, 33, 45, 55, 57, 75, 95, 99, 165, 171, 209, 225, 275, 285, 401, 475, 495, 627, 825, 855, 1045, 1203, 1425, 1881, 2005, 2475, 3135, 3609, 4275, 4411, 5225, 6015, 7619, 9405, 10025, 13233, 15675, 18045, 22055, 22857, 30075, 38095, 39699, 47025, 66165, 68571, 83809, 90225, 110275, 114285, 190475, 198495, 251427, 330825, 342855, 419045, 571425, 754281, 992475, 1257135, 1714275, 2095225, 3771405, 6285675, 18857025]

約数ペア:

[(1, 18857025), (3, 6285675), (5, 3771405), (9, 2095225), (11, 1714275), (15, 1257135), (19, 992475), (25, 754281), (33, 571425), (45, 419045), (55, 342855), (57, 330825), (75, 251427), (95, 198495), (99, 190475), (165, 114285), (171, 110275), (209, 90225), (225, 83809), (275, 68571), (285, 66165), (401, 47025), (475, 39699), (495, 38095), (627, 30075), (825, 22857), (855, 22055), (1045, 18045), (1203, 15675), (1425, 13233), (1881, 10025), (2005, 9405), (2475, 7619), (3135, 6015), (3609, 5225), (4275, 4411)]