20484152

素因数分解:

$2^3\times {\mathrm{13}}^2\times {\mathrm{109}}^1\times {\mathrm{139}}^1$

素因数の和:280

約数の個数: 48

約数和(自身を含む): 42273000

約数和(自身を除く): 21788848

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 109, 139, 169, 218, 278, 338, 436, 556, 676, 872, 1112, 1352, 1417, 1807, 2834, 3614, 5668, 7228, 11336, 14456, 15151, 18421, 23491, 30302, 36842, 46982, 60604, 73684, 93964, 121208, 147368, 187928, 196963, 393926, 787852, 1575704, 2560519, 5121038, 10242076, 20484152]

約数ペア:

[(1, 20484152), (2, 10242076), (4, 5121038), (8, 2560519), (13, 1575704), (26, 787852), (52, 393926), (104, 196963), (109, 187928), (139, 147368), (169, 121208), (218, 93964), (278, 73684), (338, 60604), (436, 46982), (556, 36842), (676, 30302), (872, 23491), (1112, 18421), (1352, 15151), (1417, 14456), (1807, 11336), (2834, 7228), (3614, 5668)]