20399010

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{157}}^1$

素因数の和:299

約数の個数: 64

約数和(自身を含む): 50782464

約数和(自身を除く): 30383454

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 61, 71, 122, 142, 157, 183, 213, 305, 314, 355, 366, 426, 471, 610, 710, 785, 915, 942, 1065, 1570, 1830, 2130, 2355, 4331, 4710, 8662, 9577, 11147, 12993, 19154, 21655, 22294, 25986, 28731, 33441, 43310, 47885, 55735, 57462, 64965, 66882, 95770, 111470, 129930, 143655, 167205, 287310, 334410, 679967, 1359934, 2039901, 3399835, 4079802, 6799670, 10199505, 20399010]

約数ペア:

[(1, 20399010), (2, 10199505), (3, 6799670), (5, 4079802), (6, 3399835), (10, 2039901), (15, 1359934), (30, 679967), (61, 334410), (71, 287310), (122, 167205), (142, 143655), (157, 129930), (183, 111470), (213, 95770), (305, 66882), (314, 64965), (355, 57462), (366, 55735), (426, 47885), (471, 43310), (610, 33441), (710, 28731), (785, 25986), (915, 22294), (942, 21655), (1065, 19154), (1570, 12993), (1830, 11147), (2130, 9577), (2355, 8662), (4331, 4710)]