20675620

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{6421}}^1$

素因数の和:6460

約数の個数: 48

約数和(自身を含む): 51787008

約数和(自身を除く): 31111388

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 70, 92, 115, 140, 161, 230, 322, 460, 644, 805, 1610, 3220, 6421, 12842, 25684, 32105, 44947, 64210, 89894, 128420, 147683, 179788, 224735, 295366, 449470, 590732, 738415, 898940, 1033781, 1476830, 2067562, 2953660, 4135124, 5168905, 10337810, 20675620]

約数ペア:

[(1, 20675620), (2, 10337810), (4, 5168905), (5, 4135124), (7, 2953660), (10, 2067562), (14, 1476830), (20, 1033781), (23, 898940), (28, 738415), (35, 590732), (46, 449470), (70, 295366), (92, 224735), (115, 179788), (140, 147683), (161, 128420), (230, 89894), (322, 64210), (460, 44947), (644, 32105), (805, 25684), (1610, 12842), (3220, 6421)]