20555015

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{101}}^2$

素因数の和:251

約数の個数: 24

約数和(自身を含む): 27694464

約数和(自身を除く): 7139449

約数列:

[1, 5, 13, 31, 65, 101, 155, 403, 505, 1313, 2015, 3131, 6565, 10201, 15655, 40703, 51005, 132613, 203515, 316231, 663065, 1581155, 4111003, 20555015]

約数ペア:

[(1, 20555015), (5, 4111003), (13, 1581155), (31, 663065), (65, 316231), (101, 203515), (155, 132613), (403, 51005), (505, 40703), (1313, 15655), (2015, 10201), (3131, 6565)]