20995760

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^2\times {\mathrm{727}}^1$

素因数の和:778

約数の個数: 60

約数和(自身を含む): 51590448

約数和(自身を除く): 30594688

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 361, 380, 722, 727, 760, 1444, 1454, 1520, 1805, 2888, 2908, 3610, 3635, 5776, 5816, 7220, 7270, 11632, 13813, 14440, 14540, 27626, 28880, 29080, 55252, 58160, 69065, 110504, 138130, 221008, 262447, 276260, 524894, 552520, 1049788, 1105040, 1312235, 2099576, 2624470, 4199152, 5248940, 10497880, 20995760]

約数ペア:

[(1, 20995760), (2, 10497880), (4, 5248940), (5, 4199152), (8, 2624470), (10, 2099576), (16, 1312235), (19, 1105040), (20, 1049788), (38, 552520), (40, 524894), (76, 276260), (80, 262447), (95, 221008), (152, 138130), (190, 110504), (304, 69065), (361, 58160), (380, 55252), (722, 29080), (727, 28880), (760, 27626), (1444, 14540), (1454, 14440), (1520, 13813), (1805, 11632), (2888, 7270), (2908, 7220), (3610, 5816), (3635, 5776)]