19498040

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^2\times {\mathrm{131}}^1$

素因数の和:264

約数の個数: 48

約数和(自身を含む): 44942040

約数和(自身を除く): 25444000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 131, 244, 262, 305, 488, 524, 610, 655, 1048, 1220, 1310, 2440, 2620, 3721, 5240, 7442, 7991, 14884, 15982, 18605, 29768, 31964, 37210, 39955, 63928, 74420, 79910, 148840, 159820, 319640, 487451, 974902, 1949804, 2437255, 3899608, 4874510, 9749020, 19498040]

約数ペア:

[(1, 19498040), (2, 9749020), (4, 4874510), (5, 3899608), (8, 2437255), (10, 1949804), (20, 974902), (40, 487451), (61, 319640), (122, 159820), (131, 148840), (244, 79910), (262, 74420), (305, 63928), (488, 39955), (524, 37210), (610, 31964), (655, 29768), (1048, 18605), (1220, 15982), (1310, 14884), (2440, 7991), (2620, 7442), (3721, 5240)]