21280948

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{6709}}^1$

素因数の和:6787

約数の個数: 24

約数和(自身を含む): 40769960

約数和(自身を除く): 19489012

約数列:

[1, 2, 4, 13, 26, 52, 61, 122, 244, 793, 1586, 3172, 6709, 13418, 26836, 87217, 174434, 348868, 409249, 818498, 1636996, 5320237, 10640474, 21280948]

約数ペア:

[(1, 21280948), (2, 10640474), (4, 5320237), (13, 1636996), (26, 818498), (52, 409249), (61, 348868), (122, 174434), (244, 87217), (793, 26836), (1586, 13418), (3172, 6709)]