19855745

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{151}}^1$

素因数の和:210

約数の個数: 48

約数和(自身を含む): 31358208

約数和(自身を除く): 11502463

約数列:

[1, 5, 7, 13, 17, 35, 65, 85, 91, 119, 151, 221, 289, 455, 595, 755, 1057, 1105, 1445, 1547, 1963, 2023, 2567, 3757, 5285, 7735, 9815, 10115, 12835, 13741, 17969, 18785, 26299, 33371, 43639, 68705, 89845, 131495, 166855, 218195, 233597, 305473, 567307, 1167985, 1527365, 2836535, 3971149, 19855745]

約数ペア:

[(1, 19855745), (5, 3971149), (7, 2836535), (13, 1527365), (17, 1167985), (35, 567307), (65, 305473), (85, 233597), (91, 218195), (119, 166855), (151, 131495), (221, 89845), (289, 68705), (455, 43639), (595, 33371), (755, 26299), (1057, 18785), (1105, 17969), (1445, 13741), (1547, 12835), (1963, 10115), (2023, 9815), (2567, 7735), (3757, 5285)]