20555353

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{23}}^2\times {\mathrm{61}}^1$

素因数の和:134

約数の個数: 36

約数和(自身を含む): 27360228

約数和(自身を除く): 6804875

約数列:

[1, 7, 13, 23, 49, 61, 91, 161, 299, 427, 529, 637, 793, 1127, 1403, 2093, 2989, 3703, 5551, 6877, 9821, 14651, 18239, 25921, 32269, 38857, 48139, 68747, 127673, 225883, 336973, 419497, 893711, 1581181, 2936479, 20555353]

約数ペア:

[(1, 20555353), (7, 2936479), (13, 1581181), (23, 893711), (49, 419497), (61, 336973), (91, 225883), (161, 127673), (299, 68747), (427, 48139), (529, 38857), (637, 32269), (793, 25921), (1127, 18239), (1403, 14651), (2093, 9821), (2989, 6877), (3703, 5551)]