20899215

素因数分解:

$3^5\times 5^1\times {\mathrm{103}}^1\times {\mathrm{167}}^1$

素因数の和:290

約数の個数: 48

約数和(自身を含む): 38158848

約数和(自身を除く): 17259633

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 103, 135, 167, 243, 309, 405, 501, 515, 835, 927, 1215, 1503, 1545, 2505, 2781, 4509, 4635, 7515, 8343, 13527, 13905, 17201, 22545, 25029, 40581, 41715, 51603, 67635, 86005, 125145, 154809, 202905, 258015, 464427, 774045, 1393281, 2322135, 4179843, 6966405, 20899215]

約数ペア:

[(1, 20899215), (3, 6966405), (5, 4179843), (9, 2322135), (15, 1393281), (27, 774045), (45, 464427), (81, 258015), (103, 202905), (135, 154809), (167, 125145), (243, 86005), (309, 67635), (405, 51603), (501, 41715), (515, 40581), (835, 25029), (927, 22545), (1215, 17201), (1503, 13905), (1545, 13527), (2505, 8343), (2781, 7515), (4509, 4635)]