20644715

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{157}}^1$

素因数の和:216

約数の個数: 48

約数和(自身を含む): 32596032

約数和(自身を除く): 11951317

約数列:

[1, 5, 7, 13, 17, 35, 65, 85, 91, 119, 157, 221, 289, 455, 595, 785, 1099, 1105, 1445, 1547, 2023, 2041, 2669, 3757, 5495, 7735, 10115, 10205, 13345, 14287, 18683, 18785, 26299, 34697, 45373, 71435, 93415, 131495, 173485, 226865, 242879, 317611, 589849, 1214395, 1588055, 2949245, 4128943, 20644715]

約数ペア:

[(1, 20644715), (5, 4128943), (7, 2949245), (13, 1588055), (17, 1214395), (35, 589849), (65, 317611), (85, 242879), (91, 226865), (119, 173485), (157, 131495), (221, 93415), (289, 71435), (455, 45373), (595, 34697), (785, 26299), (1099, 18785), (1105, 18683), (1445, 14287), (1547, 13345), (2023, 10205), (2041, 10115), (2669, 7735), (3757, 5495)]