21189220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{6269}}^1$

素因数の和:6304

約数の個数: 36

約数和(自身を含む): 48191220

約数和(自身を除く): 27002000

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 169, 260, 338, 676, 845, 1690, 3380, 6269, 12538, 25076, 31345, 62690, 81497, 125380, 162994, 325988, 407485, 814970, 1059461, 1629940, 2118922, 4237844, 5297305, 10594610, 21189220]

約数ペア:

[(1, 21189220), (2, 10594610), (4, 5297305), (5, 4237844), (10, 2118922), (13, 1629940), (20, 1059461), (26, 814970), (52, 407485), (65, 325988), (130, 162994), (169, 125380), (260, 81497), (338, 62690), (676, 31345), (845, 25076), (1690, 12538), (3380, 6269)]