20931794

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1$

素因数の和:155

約数の個数: 64

約数和(自身を含む): 39191040

約数和(自身を除く): 18259246

約数列:

[1, 2, 13, 17, 23, 26, 29, 34, 46, 58, 71, 142, 221, 299, 377, 391, 442, 493, 598, 667, 754, 782, 923, 986, 1207, 1334, 1633, 1846, 2059, 2414, 3266, 4118, 5083, 6409, 8671, 10166, 11339, 12818, 15691, 17342, 21229, 22678, 26767, 27761, 31382, 35003, 42458, 47357, 53534, 55522, 70006, 94714, 147407, 294814, 360893, 455039, 615641, 721786, 805069, 910078, 1231282, 1610138, 10465897, 20931794]

約数ペア:

[(1, 20931794), (2, 10465897), (13, 1610138), (17, 1231282), (23, 910078), (26, 805069), (29, 721786), (34, 615641), (46, 455039), (58, 360893), (71, 294814), (142, 147407), (221, 94714), (299, 70006), (377, 55522), (391, 53534), (442, 47357), (493, 42458), (598, 35003), (667, 31382), (754, 27761), (782, 26767), (923, 22678), (986, 21229), (1207, 17342), (1334, 15691), (1633, 12818), (1846, 11339), (2059, 10166), (2414, 8671), (3266, 6409), (4118, 5083)]