19914531

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{613}}^1$

素因数の和:660

約数の個数: 48

約数和(自身を含む): 35277984

約数和(自身を除く): 15363453

約数列:

[1, 3, 7, 13, 17, 21, 39, 49, 51, 91, 119, 147, 221, 273, 357, 613, 637, 663, 833, 1547, 1839, 1911, 2499, 4291, 4641, 7969, 10421, 10829, 12873, 23907, 30037, 31263, 32487, 55783, 72947, 90111, 135473, 167349, 218841, 390481, 406419, 510629, 948311, 1171443, 1531887, 2844933, 6638177, 19914531]

約数ペア:

[(1, 19914531), (3, 6638177), (7, 2844933), (13, 1531887), (17, 1171443), (21, 948311), (39, 510629), (49, 406419), (51, 390481), (91, 218841), (119, 167349), (147, 135473), (221, 90111), (273, 72947), (357, 55783), (613, 32487), (637, 31263), (663, 30037), (833, 23907), (1547, 12873), (1839, 10829), (1911, 10421), (2499, 7969), (4291, 4641)]