21621990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{55441}}^1$

素因数の和:55464

約数の個数: 32

約数和(自身を含む): 55885536

約数和(自身を除く): 34263546

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 55441, 110882, 166323, 277205, 332646, 554410, 720733, 831615, 1441466, 1663230, 2162199, 3603665, 4324398, 7207330, 10810995, 21621990]

約数ペア:

[(1, 21621990), (2, 10810995), (3, 7207330), (5, 4324398), (6, 3603665), (10, 2162199), (13, 1663230), (15, 1441466), (26, 831615), (30, 720733), (39, 554410), (65, 332646), (78, 277205), (130, 166323), (195, 110882), (390, 55441)]