21400155

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{1657}}^1$

素因数の和:1716

約数の個数: 48

約数和(自身を含む): 43452864

約数和(自身を除く): 22052709

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 41, 45, 63, 105, 123, 205, 287, 315, 369, 615, 861, 1435, 1657, 1845, 2583, 4305, 4971, 8285, 11599, 12915, 14913, 24855, 34797, 57995, 67937, 74565, 104391, 173985, 203811, 339685, 475559, 521955, 611433, 1019055, 1426677, 2377795, 3057165, 4280031, 7133385, 21400155]

約数ペア:

[(1, 21400155), (3, 7133385), (5, 4280031), (7, 3057165), (9, 2377795), (15, 1426677), (21, 1019055), (35, 611433), (41, 521955), (45, 475559), (63, 339685), (105, 203811), (123, 173985), (205, 104391), (287, 74565), (315, 67937), (369, 57995), (615, 34797), (861, 24855), (1435, 14913), (1657, 12915), (1845, 11599), (2583, 8285), (4305, 4971)]