20985244

素因数分解:

$2^2\times 7^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1\times {\mathrm{179}}^1$

素因数の和:322

約数の個数: 48

約数和(自身を含む): 43545600

約数和(自身を除く): 22560356

約数列:

[1, 2, 4, 7, 14, 28, 53, 79, 106, 158, 179, 212, 316, 358, 371, 553, 716, 742, 1106, 1253, 1484, 2212, 2506, 4187, 5012, 8374, 9487, 14141, 16748, 18974, 28282, 29309, 37948, 56564, 58618, 66409, 98987, 117236, 132818, 197974, 265636, 395948, 749473, 1498946, 2997892, 5246311, 10492622, 20985244]

約数ペア:

[(1, 20985244), (2, 10492622), (4, 5246311), (7, 2997892), (14, 1498946), (28, 749473), (53, 395948), (79, 265636), (106, 197974), (158, 132818), (179, 117236), (212, 98987), (316, 66409), (358, 58618), (371, 56564), (553, 37948), (716, 29309), (742, 28282), (1106, 18974), (1253, 16748), (1484, 14141), (2212, 9487), (2506, 8374), (4187, 5012)]