138990460

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{20261}}^1$

素因数の和:20291

約数の個数: 48

約数和(自身を含む): 340401600

約数和(自身を除く): 201411140

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 343, 490, 686, 980, 1372, 1715, 3430, 6860, 20261, 40522, 81044, 101305, 141827, 202610, 283654, 405220, 567308, 709135, 992789, 1418270, 1985578, 2836540, 3971156, 4963945, 6949523, 9927890, 13899046, 19855780, 27798092, 34747615, 69495230, 138990460]

約数ペア:

[(1, 138990460), (2, 69495230), (4, 34747615), (5, 27798092), (7, 19855780), (10, 13899046), (14, 9927890), (20, 6949523), (28, 4963945), (35, 3971156), (49, 2836540), (70, 1985578), (98, 1418270), (140, 992789), (196, 709135), (245, 567308), (343, 405220), (490, 283654), (686, 202610), (980, 141827), (1372, 101305), (1715, 81044), (3430, 40522), (6860, 20261)]