21305865

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{6997}}^1$

素因数の和:7041

約数の個数: 32

約数和(自身を含む): 40308480

約数和(自身を除く): 19002615

約数列:

[1, 3, 5, 7, 15, 21, 29, 35, 87, 105, 145, 203, 435, 609, 1015, 3045, 6997, 20991, 34985, 48979, 104955, 146937, 202913, 244895, 608739, 734685, 1014565, 1420391, 3043695, 4261173, 7101955, 21305865]

約数ペア:

[(1, 21305865), (3, 7101955), (5, 4261173), (7, 3043695), (15, 1420391), (21, 1014565), (29, 734685), (35, 608739), (87, 244895), (105, 202913), (145, 146937), (203, 104955), (435, 48979), (609, 34985), (1015, 20991), (3045, 6997)]