31780580

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{3943}}^1$

素因数の和:3996

約数の個数: 48

約数和(自身を含む): 74210304

約数和(自身を除く): 42429724

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 52, 62, 65, 124, 130, 155, 260, 310, 403, 620, 806, 1612, 2015, 3943, 4030, 7886, 8060, 15772, 19715, 39430, 51259, 78860, 102518, 122233, 205036, 244466, 256295, 488932, 512590, 611165, 1025180, 1222330, 1589029, 2444660, 3178058, 6356116, 7945145, 15890290, 31780580]

約数ペア:

[(1, 31780580), (2, 15890290), (4, 7945145), (5, 6356116), (10, 3178058), (13, 2444660), (20, 1589029), (26, 1222330), (31, 1025180), (52, 611165), (62, 512590), (65, 488932), (124, 256295), (130, 244466), (155, 205036), (260, 122233), (310, 102518), (403, 78860), (620, 51259), (806, 39430), (1612, 19715), (2015, 15772), (3943, 8060), (4030, 7886)]