81389825

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{421}}^1$

素因数の和:498

約数の個数: 48

約数和(自身を含む): 119307840

約数和(自身を除く): 37918015

約数列:

[1, 5, 11, 19, 25, 37, 55, 95, 185, 209, 275, 407, 421, 475, 703, 925, 1045, 2035, 2105, 3515, 4631, 5225, 7733, 7999, 10175, 10525, 15577, 17575, 23155, 38665, 39995, 77885, 87989, 115775, 171347, 193325, 199975, 295963, 389425, 439945, 856735, 1479815, 2199725, 3255593, 4283675, 7399075, 16277965, 81389825]

約数ペア:

[(1, 81389825), (5, 16277965), (11, 7399075), (19, 4283675), (25, 3255593), (37, 2199725), (55, 1479815), (95, 856735), (185, 439945), (209, 389425), (275, 295963), (407, 199975), (421, 193325), (475, 171347), (703, 115775), (925, 87989), (1045, 77885), (2035, 39995), (2105, 38665), (3515, 23155), (4631, 17575), (5225, 15577), (7733, 10525), (7999, 10175)]