21452860

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{577}}^1$

素因数の和:623

約数の個数: 72

約数和(自身を含む): 53310096

約数和(自身を除く): 31857236

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 44, 52, 55, 65, 110, 130, 143, 169, 220, 260, 286, 338, 572, 577, 676, 715, 845, 1154, 1430, 1690, 1859, 2308, 2860, 2885, 3380, 3718, 5770, 6347, 7436, 7501, 9295, 11540, 12694, 15002, 18590, 25388, 30004, 31735, 37180, 37505, 63470, 75010, 82511, 97513, 126940, 150020, 165022, 195026, 330044, 390052, 412555, 487565, 825110, 975130, 1072643, 1650220, 1950260, 2145286, 4290572, 5363215, 10726430, 21452860]

約数ペア:

[(1, 21452860), (2, 10726430), (4, 5363215), (5, 4290572), (10, 2145286), (11, 1950260), (13, 1650220), (20, 1072643), (22, 975130), (26, 825110), (44, 487565), (52, 412555), (55, 390052), (65, 330044), (110, 195026), (130, 165022), (143, 150020), (169, 126940), (220, 97513), (260, 82511), (286, 75010), (338, 63470), (572, 37505), (577, 37180), (676, 31735), (715, 30004), (845, 25388), (1154, 18590), (1430, 15002), (1690, 12694), (1859, 11540), (2308, 9295), (2860, 7501), (2885, 7436), (3380, 6347), (3718, 5770)]