18850545

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{83}}^1\times {\mathrm{103}}^1$

素因数の和:211

約数の個数: 72

約数和(自身を含む): 38840256

約数和(自身を除く): 19989711

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 49, 63, 83, 103, 105, 147, 245, 249, 309, 315, 415, 441, 515, 581, 721, 735, 747, 927, 1245, 1545, 1743, 2163, 2205, 2905, 3605, 3735, 4067, 4635, 5047, 5229, 6489, 8549, 8715, 10815, 12201, 15141, 20335, 25235, 25647, 26145, 32445, 36603, 42745, 45423, 59843, 61005, 75705, 76941, 128235, 179529, 183015, 227115, 299215, 384705, 418901, 538587, 897645, 1256703, 2094505, 2692935, 3770109, 6283515, 18850545]

約数ペア:

[(1, 18850545), (3, 6283515), (5, 3770109), (7, 2692935), (9, 2094505), (15, 1256703), (21, 897645), (35, 538587), (45, 418901), (49, 384705), (63, 299215), (83, 227115), (103, 183015), (105, 179529), (147, 128235), (245, 76941), (249, 75705), (309, 61005), (315, 59843), (415, 45423), (441, 42745), (515, 36603), (581, 32445), (721, 26145), (735, 25647), (747, 25235), (927, 20335), (1245, 15141), (1545, 12201), (1743, 10815), (2163, 8715), (2205, 8549), (2905, 6489), (3605, 5229), (3735, 5047), (4067, 4635)]