21981540

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{199}}^1\times {\mathrm{263}}^1$

素因数の和:481

約数の個数: 96

約数和(自身を含む): 70963200

約数和(自身を除く): 48981660

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, 199, 210, 263, 398, 420, 526, 597, 789, 796, 995, 1052, 1194, 1315, 1393, 1578, 1841, 1990, 2388, 2630, 2786, 2985, 3156, 3682, 3945, 3980, 4179, 5260, 5523, 5572, 5970, 6965, 7364, 7890, 8358, 9205, 11046, 11940, 13930, 15780, 16716, 18410, 20895, 22092, 27615, 27860, 36820, 41790, 52337, 55230, 83580, 104674, 110460, 157011, 209348, 261685, 314022, 366359, 523370, 628044, 732718, 785055, 1046740, 1099077, 1465436, 1570110, 1831795, 2198154, 3140220, 3663590, 4396308, 5495385, 7327180, 10990770, 21981540]

約数ペア:

[(1, 21981540), (2, 10990770), (3, 7327180), (4, 5495385), (5, 4396308), (6, 3663590), (7, 3140220), (10, 2198154), (12, 1831795), (14, 1570110), (15, 1465436), (20, 1099077), (21, 1046740), (28, 785055), (30, 732718), (35, 628044), (42, 523370), (60, 366359), (70, 314022), (84, 261685), (105, 209348), (140, 157011), (199, 110460), (210, 104674), (263, 83580), (398, 55230), (420, 52337), (526, 41790), (597, 36820), (789, 27860), (796, 27615), (995, 22092), (1052, 20895), (1194, 18410), (1315, 16716), (1393, 15780), (1578, 13930), (1841, 11940), (1990, 11046), (2388, 9205), (2630, 8358), (2786, 7890), (2985, 7364), (3156, 6965), (3682, 5970), (3945, 5572), (3980, 5523), (4179, 5260)]