20019220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{2081}}^1$

素因数の和:2140

約数の個数: 48

約数和(自身を含む): 46520208

約数和(自身を除く): 26500988

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 37, 52, 65, 74, 130, 148, 185, 260, 370, 481, 740, 962, 1924, 2081, 2405, 4162, 4810, 8324, 9620, 10405, 20810, 27053, 41620, 54106, 76997, 108212, 135265, 153994, 270530, 307988, 384985, 541060, 769970, 1000961, 1539940, 2001922, 4003844, 5004805, 10009610, 20019220]

約数ペア:

[(1, 20019220), (2, 10009610), (4, 5004805), (5, 4003844), (10, 2001922), (13, 1539940), (20, 1000961), (26, 769970), (37, 541060), (52, 384985), (65, 307988), (74, 270530), (130, 153994), (148, 135265), (185, 108212), (260, 76997), (370, 54106), (481, 41620), (740, 27053), (962, 20810), (1924, 10405), (2081, 9620), (2405, 8324), (4162, 4810)]