20647228

素因数分解:

$2^2\times 7^3\times {\mathrm{101}}^1\times {\mathrm{149}}^1$

素因数の和:275

約数の個数: 48

約数和(自身を含む): 42840000

約数和(自身を除く): 22192772

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 101, 149, 196, 202, 298, 343, 404, 596, 686, 707, 1043, 1372, 1414, 2086, 2828, 4172, 4949, 7301, 9898, 14602, 15049, 19796, 29204, 30098, 34643, 51107, 60196, 69286, 102214, 105343, 138572, 204428, 210686, 421372, 737401, 1474802, 2949604, 5161807, 10323614, 20647228]

約数ペア:

[(1, 20647228), (2, 10323614), (4, 5161807), (7, 2949604), (14, 1474802), (28, 737401), (49, 421372), (98, 210686), (101, 204428), (149, 138572), (196, 105343), (202, 102214), (298, 69286), (343, 60196), (404, 51107), (596, 34643), (686, 30098), (707, 29204), (1043, 19796), (1372, 15049), (1414, 14602), (2086, 9898), (2828, 7301), (4172, 4949)]