20521215

素因数分解:

$3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1063}}^1$

素因数の和:1101

約数の個数: 64

約数和(自身を含む): 42900480

約数和(自身を除く): 22379265

約数列:

[1, 3, 5, 9, 11, 13, 15, 27, 33, 39, 45, 55, 65, 99, 117, 135, 143, 165, 195, 297, 351, 429, 495, 585, 715, 1063, 1287, 1485, 1755, 2145, 3189, 3861, 5315, 6435, 9567, 11693, 13819, 15945, 19305, 28701, 35079, 41457, 47835, 58465, 69095, 105237, 124371, 143505, 152009, 175395, 207285, 315711, 373113, 456027, 526185, 621855, 760045, 1368081, 1578555, 1865565, 2280135, 4104243, 6840405, 20521215]

約数ペア:

[(1, 20521215), (3, 6840405), (5, 4104243), (9, 2280135), (11, 1865565), (13, 1578555), (15, 1368081), (27, 760045), (33, 621855), (39, 526185), (45, 456027), (55, 373113), (65, 315711), (99, 207285), (117, 175395), (135, 152009), (143, 143505), (165, 124371), (195, 105237), (297, 69095), (351, 58465), (429, 47835), (495, 41457), (585, 35079), (715, 28701), (1063, 19305), (1287, 15945), (1485, 13819), (1755, 11693), (2145, 9567), (3189, 6435), (3861, 5315)]