21121380

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{16763}}^1$

素因数の和:16785

約数の個数: 72

約数和(自身を含む): 73225152

約数和(自身を除く): 52103772

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 16763, 33526, 50289, 67052, 83815, 100578, 117341, 150867, 167630, 201156, 234682, 251445, 301734, 335260, 352023, 469364, 502890, 586705, 603468, 704046, 754335, 1005780, 1056069, 1173410, 1408092, 1508670, 1760115, 2112138, 2346820, 3017340, 3520230, 4224276, 5280345, 7040460, 10560690, 21121380]

約数ペア:

[(1, 21121380), (2, 10560690), (3, 7040460), (4, 5280345), (5, 4224276), (6, 3520230), (7, 3017340), (9, 2346820), (10, 2112138), (12, 1760115), (14, 1508670), (15, 1408092), (18, 1173410), (20, 1056069), (21, 1005780), (28, 754335), (30, 704046), (35, 603468), (36, 586705), (42, 502890), (45, 469364), (60, 352023), (63, 335260), (70, 301734), (84, 251445), (90, 234682), (105, 201156), (126, 167630), (140, 150867), (180, 117341), (210, 100578), (252, 83815), (315, 67052), (420, 50289), (630, 33526), (1260, 16763)]