21229780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{571}}^1$

素因数の和:617

約数の個数: 72

約数和(自身を含む): 52756704

約数和(自身を除く): 31526924

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, 571, 572, 676, 715, 845, 1142, 1430, 1690, 1859, 2284, 2855, 2860, 3380, 3718, 5710, 6281, 7423, 7436, 9295, 11420, 12562, 14846, 18590, 25124, 29692, 31405, 37115, 37180, 62810, 74230, 81653, 96499, 125620, 148460, 163306, 192998, 326612, 385996, 408265, 482495, 816530, 964990, 1061489, 1633060, 1929980, 2122978, 4245956, 5307445, 10614890, 21229780]

約数ペア:

[(1, 21229780), (2, 10614890), (4, 5307445), (5, 4245956), (10, 2122978), (11, 1929980), (13, 1633060), (20, 1061489), (22, 964990), (26, 816530), (44, 482495), (52, 408265), (55, 385996), (65, 326612), (110, 192998), (130, 163306), (143, 148460), (169, 125620), (220, 96499), (260, 81653), (286, 74230), (338, 62810), (571, 37180), (572, 37115), (676, 31405), (715, 29692), (845, 25124), (1142, 18590), (1430, 14846), (1690, 12562), (1859, 11420), (2284, 9295), (2855, 7436), (2860, 7423), (3380, 6281), (3718, 5710)]