21665720

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{14639}}^1$

素因数の和:14687

約数の個数: 32

約数和(自身を含む): 50068800

約数和(自身を除く): 28403080

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 148, 185, 296, 370, 740, 1480, 14639, 29278, 58556, 73195, 117112, 146390, 292780, 541643, 585560, 1083286, 2166572, 2708215, 4333144, 5416430, 10832860, 21665720]

約数ペア:

[(1, 21665720), (2, 10832860), (4, 5416430), (5, 4333144), (8, 2708215), (10, 2166572), (20, 1083286), (37, 585560), (40, 541643), (74, 292780), (148, 146390), (185, 117112), (296, 73195), (370, 58556), (740, 29278), (1480, 14639)]