20986550

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{389}}^1$

素因数の和:497

約数の個数: 48

約数和(自身を含む): 42653520

約数和(自身を除く): 21666970

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 83, 130, 166, 325, 389, 415, 650, 778, 830, 1079, 1945, 2075, 2158, 3890, 4150, 5057, 5395, 9725, 10114, 10790, 19450, 25285, 26975, 32287, 50570, 53950, 64574, 126425, 161435, 252850, 322870, 419731, 807175, 839462, 1614350, 2098655, 4197310, 10493275, 20986550]

約数ペア:

[(1, 20986550), (2, 10493275), (5, 4197310), (10, 2098655), (13, 1614350), (25, 839462), (26, 807175), (50, 419731), (65, 322870), (83, 252850), (130, 161435), (166, 126425), (325, 64574), (389, 53950), (415, 50570), (650, 32287), (778, 26975), (830, 25285), (1079, 19450), (1945, 10790), (2075, 10114), (2158, 9725), (3890, 5395), (4150, 5057)]