19720250

素因数分解:

$2^1\times 5^3\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{101}}^1$

素因数の和:200

約数の個数: 64

約数和(自身を含む): 41243904

約数和(自身を除く): 21523654

約数列:

[1, 2, 5, 10, 11, 22, 25, 50, 55, 71, 101, 110, 125, 142, 202, 250, 275, 355, 505, 550, 710, 781, 1010, 1111, 1375, 1562, 1775, 2222, 2525, 2750, 3550, 3905, 5050, 5555, 7171, 7810, 8875, 11110, 12625, 14342, 17750, 19525, 25250, 27775, 35855, 39050, 55550, 71710, 78881, 97625, 138875, 157762, 179275, 195250, 277750, 358550, 394405, 788810, 896375, 1792750, 1972025, 3944050, 9860125, 19720250]

約数ペア:

[(1, 19720250), (2, 9860125), (5, 3944050), (10, 1972025), (11, 1792750), (22, 896375), (25, 788810), (50, 394405), (55, 358550), (71, 277750), (101, 195250), (110, 179275), (125, 157762), (142, 138875), (202, 97625), (250, 78881), (275, 71710), (355, 55550), (505, 39050), (550, 35855), (710, 27775), (781, 25250), (1010, 19525), (1111, 17750), (1375, 14342), (1562, 12625), (1775, 11110), (2222, 8875), (2525, 7810), (2750, 7171), (3550, 5555), (3905, 5050)]