20935551

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{347}}^1$

素因数の和:400

約数の個数: 48

約数和(自身を含む): 36681984

約数和(自身を除く): 15746433

約数列:

[1, 3, 7, 13, 17, 21, 39, 51, 91, 119, 169, 221, 273, 347, 357, 507, 663, 1041, 1183, 1547, 2429, 2873, 3549, 4511, 4641, 5899, 7287, 8619, 13533, 17697, 20111, 31577, 41293, 58643, 60333, 76687, 94731, 123879, 175929, 230061, 410501, 536809, 996931, 1231503, 1610427, 2990793, 6978517, 20935551]

約数ペア:

[(1, 20935551), (3, 6978517), (7, 2990793), (13, 1610427), (17, 1231503), (21, 996931), (39, 536809), (51, 410501), (91, 230061), (119, 175929), (169, 123879), (221, 94731), (273, 76687), (347, 60333), (357, 58643), (507, 41293), (663, 31577), (1041, 20111), (1183, 17697), (1547, 13533), (2429, 8619), (2873, 7287), (3549, 5899), (4511, 4641)]