21490455

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{59}}^1\times {\mathrm{3469}}^1$

素因数の和:3543

約数の個数: 32

約数和(自身を含む): 39974400

約数和(自身を除く): 18483945

約数列:

[1, 3, 5, 7, 15, 21, 35, 59, 105, 177, 295, 413, 885, 1239, 2065, 3469, 6195, 10407, 17345, 24283, 52035, 72849, 121415, 204671, 364245, 614013, 1023355, 1432697, 3070065, 4298091, 7163485, 21490455]

約数ペア:

[(1, 21490455), (3, 7163485), (5, 4298091), (7, 3070065), (15, 1432697), (21, 1023355), (35, 614013), (59, 364245), (105, 204671), (177, 121415), (295, 72849), (413, 52035), (885, 24283), (1239, 17345), (2065, 10407), (3469, 6195)]