20890870

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{2087}}^1$

素因数の和:2125

約数の個数: 64

約数和(自身を含む): 50512896

約数和(自身を除く): 29622026

約数列:

[1, 2, 5, 7, 10, 11, 13, 14, 22, 26, 35, 55, 65, 70, 77, 91, 110, 130, 143, 154, 182, 286, 385, 455, 715, 770, 910, 1001, 1430, 2002, 2087, 4174, 5005, 10010, 10435, 14609, 20870, 22957, 27131, 29218, 45914, 54262, 73045, 114785, 135655, 146090, 160699, 189917, 229570, 271310, 298441, 321398, 379834, 596882, 803495, 949585, 1492205, 1606990, 1899170, 2089087, 2984410, 4178174, 10445435, 20890870]

約数ペア:

[(1, 20890870), (2, 10445435), (5, 4178174), (7, 2984410), (10, 2089087), (11, 1899170), (13, 1606990), (14, 1492205), (22, 949585), (26, 803495), (35, 596882), (55, 379834), (65, 321398), (70, 298441), (77, 271310), (91, 229570), (110, 189917), (130, 160699), (143, 146090), (154, 135655), (182, 114785), (286, 73045), (385, 54262), (455, 45914), (715, 29218), (770, 27131), (910, 22957), (1001, 20870), (1430, 14609), (2002, 10435), (2087, 10010), (4174, 5005)]