21335265

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{211}}^1$

素因数の和:339

約数の個数: 64

約数和(自身を含む): 43960320

約数和(自身を除く): 22625055

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 105, 107, 135, 189, 211, 315, 321, 535, 633, 749, 945, 963, 1055, 1477, 1605, 1899, 2247, 2889, 3165, 3745, 4431, 4815, 5697, 6741, 7385, 9495, 11235, 13293, 14445, 20223, 22155, 22577, 28485, 33705, 39879, 66465, 67731, 101115, 112885, 158039, 199395, 203193, 338655, 474117, 609579, 790195, 1015965, 1422351, 2370585, 3047895, 4267053, 7111755, 21335265]

約数ペア:

[(1, 21335265), (3, 7111755), (5, 4267053), (7, 3047895), (9, 2370585), (15, 1422351), (21, 1015965), (27, 790195), (35, 609579), (45, 474117), (63, 338655), (105, 203193), (107, 199395), (135, 158039), (189, 112885), (211, 101115), (315, 67731), (321, 66465), (535, 39879), (633, 33705), (749, 28485), (945, 22577), (963, 22155), (1055, 20223), (1477, 14445), (1605, 13293), (1899, 11235), (2247, 9495), (2889, 7385), (3165, 6741), (3745, 5697), (4431, 4815)]