21605415

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{1097}}^1$

素因数の和:1219

約数の個数: 32

約数和(自身を含む): 37630656

約数和(自身を除く): 16025241

約数列:

[1, 3, 5, 13, 15, 39, 65, 101, 195, 303, 505, 1097, 1313, 1515, 3291, 3939, 5485, 6565, 14261, 16455, 19695, 42783, 71305, 110797, 213915, 332391, 553985, 1440361, 1661955, 4321083, 7201805, 21605415]

約数ペア:

[(1, 21605415), (3, 7201805), (5, 4321083), (13, 1661955), (15, 1440361), (39, 553985), (65, 332391), (101, 213915), (195, 110797), (303, 71305), (505, 42783), (1097, 19695), (1313, 16455), (1515, 14261), (3291, 6565), (3939, 5485)]