20564980

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{103}}^1\times {\mathrm{149}}^1$

素因数の和:328

約数の個数: 48

約数和(自身を含む): 44553600

約数和(自身を除く): 23988620

約数列:

[1, 2, 4, 5, 10, 20, 67, 103, 134, 149, 206, 268, 298, 335, 412, 515, 596, 670, 745, 1030, 1340, 1490, 2060, 2980, 6901, 9983, 13802, 15347, 19966, 27604, 30694, 34505, 39932, 49915, 61388, 69010, 76735, 99830, 138020, 153470, 199660, 306940, 1028249, 2056498, 4112996, 5141245, 10282490, 20564980]

約数ペア:

[(1, 20564980), (2, 10282490), (4, 5141245), (5, 4112996), (10, 2056498), (20, 1028249), (67, 306940), (103, 199660), (134, 153470), (149, 138020), (206, 99830), (268, 76735), (298, 69010), (335, 61388), (412, 49915), (515, 39932), (596, 34505), (670, 30694), (745, 27604), (1030, 19966), (1340, 15347), (1490, 13802), (2060, 9983), (2980, 6901)]