21696780

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{51659}}^1$

素因数の和:51678

約数の個数: 48

約数和(自身を含む): 69431040

約数和(自身を除く): 47734260

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 51659, 103318, 154977, 206636, 258295, 309954, 361613, 516590, 619908, 723226, 774885, 1033180, 1084839, 1446452, 1549770, 1808065, 2169678, 3099540, 3616130, 4339356, 5424195, 7232260, 10848390, 21696780]

約数ペア:

[(1, 21696780), (2, 10848390), (3, 7232260), (4, 5424195), (5, 4339356), (6, 3616130), (7, 3099540), (10, 2169678), (12, 1808065), (14, 1549770), (15, 1446452), (20, 1084839), (21, 1033180), (28, 774885), (30, 723226), (35, 619908), (42, 516590), (60, 361613), (70, 309954), (84, 258295), (105, 206636), (140, 154977), (210, 103318), (420, 51659)]