20421401

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{887}}^1$

素因数の和:941

約数の個数: 32

約数和(自身を含む): 28643328

約数和(自身を除く): 8221927

約数列:

[1, 7, 11, 13, 23, 77, 91, 143, 161, 253, 299, 887, 1001, 1771, 2093, 3289, 6209, 9757, 11531, 20401, 23023, 68299, 80717, 126841, 142807, 224411, 265213, 887887, 1570877, 1856491, 2917343, 20421401]

約数ペア:

[(1, 20421401), (7, 2917343), (11, 1856491), (13, 1570877), (23, 887887), (77, 265213), (91, 224411), (143, 142807), (161, 126841), (253, 80717), (299, 68299), (887, 23023), (1001, 20401), (1771, 11531), (2093, 9757), (3289, 6209)]