20521750

素因数分解:

$2^1\times 5^3\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{83}}^1$

素因数の和:166

約数の個数: 64

約数和(自身を含む): 41513472

約数和(自身を除く): 20991722

約数列:

[1, 2, 5, 10, 23, 25, 43, 46, 50, 83, 86, 115, 125, 166, 215, 230, 250, 415, 430, 575, 830, 989, 1075, 1150, 1909, 1978, 2075, 2150, 2875, 3569, 3818, 4150, 4945, 5375, 5750, 7138, 9545, 9890, 10375, 10750, 17845, 19090, 20750, 24725, 35690, 47725, 49450, 82087, 89225, 95450, 123625, 164174, 178450, 238625, 247250, 410435, 446125, 477250, 820870, 892250, 2052175, 4104350, 10260875, 20521750]

約数ペア:

[(1, 20521750), (2, 10260875), (5, 4104350), (10, 2052175), (23, 892250), (25, 820870), (43, 477250), (46, 446125), (50, 410435), (83, 247250), (86, 238625), (115, 178450), (125, 164174), (166, 123625), (215, 95450), (230, 89225), (250, 82087), (415, 49450), (430, 47725), (575, 35690), (830, 24725), (989, 20750), (1075, 19090), (1150, 17845), (1909, 10750), (1978, 10375), (2075, 9890), (2150, 9545), (2875, 7138), (3569, 5750), (3818, 5375), (4150, 4945)]