21971607

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{113}}^1\times {\mathrm{197}}^1$

素因数の和:367

約数の個数: 32

約数和(自身を含む): 34670592

約数和(自身を除く): 12698985

約数列:

[1, 3, 7, 21, 47, 113, 141, 197, 329, 339, 591, 791, 987, 1379, 2373, 4137, 5311, 9259, 15933, 22261, 27777, 37177, 64813, 66783, 111531, 155827, 194439, 467481, 1046267, 3138801, 7323869, 21971607]

約数ペア:

[(1, 21971607), (3, 7323869), (7, 3138801), (21, 1046267), (47, 467481), (113, 194439), (141, 155827), (197, 111531), (329, 66783), (339, 64813), (591, 37177), (791, 27777), (987, 22261), (1379, 15933), (2373, 9259), (4137, 5311)]