19691140

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{71}}^1\times {\mathrm{283}}^1$

素因数の和:377

約数の個数: 72

約数和(自身を含む): 48952512

約数和(自身を除く): 29261372

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 71, 98, 140, 142, 196, 245, 283, 284, 355, 490, 497, 566, 710, 980, 994, 1132, 1415, 1420, 1981, 1988, 2485, 2830, 3479, 3962, 4970, 5660, 6958, 7924, 9905, 9940, 13867, 13916, 17395, 19810, 20093, 27734, 34790, 39620, 40186, 55468, 69335, 69580, 80372, 100465, 138670, 140651, 200930, 277340, 281302, 401860, 562604, 703255, 984557, 1406510, 1969114, 2813020, 3938228, 4922785, 9845570, 19691140]

約数ペア:

[(1, 19691140), (2, 9845570), (4, 4922785), (5, 3938228), (7, 2813020), (10, 1969114), (14, 1406510), (20, 984557), (28, 703255), (35, 562604), (49, 401860), (70, 281302), (71, 277340), (98, 200930), (140, 140651), (142, 138670), (196, 100465), (245, 80372), (283, 69580), (284, 69335), (355, 55468), (490, 40186), (497, 39620), (566, 34790), (710, 27734), (980, 20093), (994, 19810), (1132, 17395), (1415, 13916), (1420, 13867), (1981, 9940), (1988, 9905), (2485, 7924), (2830, 6958), (3479, 5660), (3962, 4970)]