25490680

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{337}}^1$

素因数の和:440

約数の個数: 64

約数和(自身を含む): 60353280

約数和(自身を除く): 34862600

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 61, 62, 122, 124, 155, 244, 248, 305, 310, 337, 488, 610, 620, 674, 1220, 1240, 1348, 1685, 1891, 2440, 2696, 3370, 3782, 6740, 7564, 9455, 10447, 13480, 15128, 18910, 20557, 20894, 37820, 41114, 41788, 52235, 75640, 82228, 83576, 102785, 104470, 164456, 205570, 208940, 411140, 417880, 637267, 822280, 1274534, 2549068, 3186335, 5098136, 6372670, 12745340, 25490680]

約数ペア:

[(1, 25490680), (2, 12745340), (4, 6372670), (5, 5098136), (8, 3186335), (10, 2549068), (20, 1274534), (31, 822280), (40, 637267), (61, 417880), (62, 411140), (122, 208940), (124, 205570), (155, 164456), (244, 104470), (248, 102785), (305, 83576), (310, 82228), (337, 75640), (488, 52235), (610, 41788), (620, 41114), (674, 37820), (1220, 20894), (1240, 20557), (1348, 18910), (1685, 15128), (1891, 13480), (2440, 10447), (2696, 9455), (3370, 7564), (3782, 6740)]