21031487764

素因数分解:

$2^2\times 7^2\times {\mathrm{29}}^1\times {\mathrm{1321}}^1\times {\mathrm{2801}}^1$

素因数の和:4169

約数の個数: 72

約数和(自身を含む): 44339800680

約数和(自身を除く): 23308312916

約数列:

[1, 2, 4, 7, 14, 28, 29, 49, 58, 98, 116, 196, 203, 406, 812, 1321, 1421, 2642, 2801, 2842, 5284, 5602, 5684, 9247, 11204, 18494, 19607, 36988, 38309, 39214, 64729, 76618, 78428, 81229, 129458, 137249, 153236, 162458, 258916, 268163, 274498, 324916, 536326, 548996, 568603, 1072652, 1137206, 1877141, 2274412, 3700121, 3754282, 3980221, 7400242, 7508564, 7960442, 14800484, 15920884, 25900847, 51801694, 103603388, 107303509, 181305929, 214607018, 362611858, 429214036, 725223716, 751124563, 1502249126, 3004498252, 5257871941, 10515743882, 21031487764]

約数ペア:

[(1, 21031487764), (2, 10515743882), (4, 5257871941), (7, 3004498252), (14, 1502249126), (28, 751124563), (29, 725223716), (49, 429214036), (58, 362611858), (98, 214607018), (116, 181305929), (196, 107303509), (203, 103603388), (406, 51801694), (812, 25900847), (1321, 15920884), (1421, 14800484), (2642, 7960442), (2801, 7508564), (2842, 7400242), (5284, 3980221), (5602, 3754282), (5684, 3700121), (9247, 2274412), (11204, 1877141), (18494, 1137206), (19607, 1072652), (36988, 568603), (38309, 548996), (39214, 536326), (64729, 324916), (76618, 274498), (78428, 268163), (81229, 258916), (129458, 162458), (137249, 153236)]