18131945

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{269}}^1$

素因数の和:365

約数の個数: 32

約数和(自身を含む): 25310880

約数和(自身を除く): 7178935

約数列:

[1, 5, 13, 17, 61, 65, 85, 221, 269, 305, 793, 1037, 1105, 1345, 3497, 3965, 4573, 5185, 13481, 16409, 17485, 22865, 59449, 67405, 82045, 213317, 278953, 297245, 1066585, 1394765, 3626389, 18131945]

約数ペア:

[(1, 18131945), (5, 3626389), (13, 1394765), (17, 1066585), (61, 297245), (65, 278953), (85, 213317), (221, 82045), (269, 67405), (305, 59449), (793, 22865), (1037, 17485), (1105, 16409), (1345, 13481), (3497, 5185), (3965, 4573)]