19780345

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{101}}^1\times {\mathrm{131}}^1$

素因数の和:273

約数の個数: 32

約数和(自身を含む): 27143424

約数和(自身を除く): 7363079

約数列:

[1, 5, 13, 23, 65, 101, 115, 131, 299, 505, 655, 1313, 1495, 1703, 2323, 3013, 6565, 8515, 11615, 13231, 15065, 30199, 39169, 66155, 150995, 172003, 195845, 304313, 860015, 1521565, 3956069, 19780345]

約数ペア:

[(1, 19780345), (5, 3956069), (13, 1521565), (23, 860015), (65, 304313), (101, 195845), (115, 172003), (131, 150995), (299, 66155), (505, 39169), (655, 30199), (1313, 15065), (1495, 13231), (1703, 11615), (2323, 8515), (3013, 6565)]