308999740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{20249}}^1$

素因数の和:20374

約数の個数: 48

約数和(自身を含む): 748440000

約数和(自身を除く): 439440260

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 109, 140, 218, 436, 545, 763, 1090, 1526, 2180, 3052, 3815, 7630, 15260, 20249, 40498, 80996, 101245, 141743, 202490, 283486, 404980, 566972, 708715, 1417430, 2207141, 2834860, 4414282, 8828564, 11035705, 15449987, 22071410, 30899974, 44142820, 61799948, 77249935, 154499870, 308999740]

約数ペア:

[(1, 308999740), (2, 154499870), (4, 77249935), (5, 61799948), (7, 44142820), (10, 30899974), (14, 22071410), (20, 15449987), (28, 11035705), (35, 8828564), (70, 4414282), (109, 2834860), (140, 2207141), (218, 1417430), (436, 708715), (545, 566972), (763, 404980), (1090, 283486), (1526, 202490), (2180, 141743), (3052, 101245), (3815, 80996), (7630, 40498), (15260, 20249)]