20899580

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{2593}}^1$

素因数の和:2646

約数の個数: 48

約数和(自身を含む): 48808704

約数和(自身を除く): 27909124

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, 2593, 4030, 5186, 8060, 10372, 12965, 25930, 33709, 51860, 67418, 80383, 134836, 160766, 168545, 321532, 337090, 401915, 674180, 803830, 1044979, 1607660, 2089958, 4179916, 5224895, 10449790, 20899580]

約数ペア:

[(1, 20899580), (2, 10449790), (4, 5224895), (5, 4179916), (10, 2089958), (13, 1607660), (20, 1044979), (26, 803830), (31, 674180), (52, 401915), (62, 337090), (65, 321532), (124, 168545), (130, 160766), (155, 134836), (260, 80383), (310, 67418), (403, 51860), (620, 33709), (806, 25930), (1612, 12965), (2015, 10372), (2593, 8060), (4030, 5186)]