18721125970

素因数分解:

$2^1\times 5^1\times {\mathrm{89}}^1\times {\mathrm{21034973}}^1$

素因数の和:21035069

約数の個数: 16

約数和(自身を含む): 34076657880

約数和(自身を除く): 15355531910

約数列:

[1, 2, 5, 10, 89, 178, 445, 890, 21034973, 42069946, 105174865, 210349730, 1872112597, 3744225194, 9360562985, 18721125970]

約数ペア:

[(1, 18721125970), (2, 9360562985), (5, 3744225194), (10, 1872112597), (89, 210349730), (178, 105174865), (445, 42069946), (890, 21034973)]