21308280

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{25367}}^1$

素因数の和:25388

約数の個数: 64

約数和(自身を含む): 73059840

約数和(自身を除く): 51751560

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 25367, 50734, 76101, 101468, 126835, 152202, 177569, 202936, 253670, 304404, 355138, 380505, 507340, 532707, 608808, 710276, 761010, 887845, 1014680, 1065414, 1420552, 1522020, 1775690, 2130828, 2663535, 3044040, 3551380, 4261656, 5327070, 7102760, 10654140, 21308280]

約数ペア:

[(1, 21308280), (2, 10654140), (3, 7102760), (4, 5327070), (5, 4261656), (6, 3551380), (7, 3044040), (8, 2663535), (10, 2130828), (12, 1775690), (14, 1522020), (15, 1420552), (20, 1065414), (21, 1014680), (24, 887845), (28, 761010), (30, 710276), (35, 608808), (40, 532707), (42, 507340), (56, 380505), (60, 355138), (70, 304404), (84, 253670), (105, 202936), (120, 177569), (140, 152202), (168, 126835), (210, 101468), (280, 76101), (420, 50734), (840, 25367)]