21709220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{83497}}^1$

素因数の和:83519

約数の個数: 24

約数和(自身を含む): 49096824

約数和(自身を除く): 27387604

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 83497, 166994, 333988, 417485, 834970, 1085461, 1669940, 2170922, 4341844, 5427305, 10854610, 21709220]

約数ペア:

[(1, 21709220), (2, 10854610), (4, 5427305), (5, 4341844), (10, 2170922), (13, 1669940), (20, 1085461), (26, 834970), (52, 417485), (65, 333988), (130, 166994), (260, 83497)]