21459880

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41269}}^1$

素因数の和:41293

約数の個数: 32

約数和(自身を含む): 52000200

約数和(自身を除く): 30540320

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 41269, 82538, 165076, 206345, 330152, 412690, 536497, 825380, 1072994, 1650760, 2145988, 2682485, 4291976, 5364970, 10729940, 21459880]

約数ペア:

[(1, 21459880), (2, 10729940), (4, 5364970), (5, 4291976), (8, 2682485), (10, 2145988), (13, 1650760), (20, 1072994), (26, 825380), (40, 536497), (52, 412690), (65, 330152), (104, 206345), (130, 165076), (260, 82538), (520, 41269)]