19917425

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{67}}^1$

素因数の和:158

約数の個数: 48

約数和(自身を含む): 29140992

約数和(自身を除く): 9223567

約数列:

[1, 5, 11, 23, 25, 47, 55, 67, 115, 235, 253, 275, 335, 517, 575, 737, 1081, 1175, 1265, 1541, 1675, 2585, 3149, 3685, 5405, 6325, 7705, 11891, 12925, 15745, 16951, 18425, 27025, 34639, 38525, 59455, 72427, 78725, 84755, 173195, 297275, 362135, 423775, 796697, 865975, 1810675, 3983485, 19917425]

約数ペア:

[(1, 19917425), (5, 3983485), (11, 1810675), (23, 865975), (25, 796697), (47, 423775), (55, 362135), (67, 297275), (115, 173195), (235, 84755), (253, 78725), (275, 72427), (335, 59455), (517, 38525), (575, 34639), (737, 27025), (1081, 18425), (1175, 16951), (1265, 15745), (1541, 12925), (1675, 11891), (2585, 7705), (3149, 6325), (3685, 5405)]