21140640

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{277}}^1$

素因数の和:351

約数の個数: 144

約数和(自身を含む): 73768968

約数和(自身を除く): 52628328

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 45, 48, 53, 60, 72, 80, 90, 96, 106, 120, 144, 159, 160, 180, 212, 240, 265, 277, 288, 318, 360, 424, 477, 480, 530, 554, 636, 720, 795, 831, 848, 954, 1060, 1108, 1272, 1385, 1440, 1590, 1662, 1696, 1908, 2120, 2216, 2385, 2493, 2544, 2770, 3180, 3324, 3816, 4155, 4240, 4432, 4770, 4986, 5088, 5540, 6360, 6648, 7632, 8310, 8480, 8864, 9540, 9972, 11080, 12465, 12720, 13296, 14681, 15264, 16620, 19080, 19944, 22160, 24930, 25440, 26592, 29362, 33240, 38160, 39888, 44043, 44320, 49860, 58724, 66480, 73405, 76320, 79776, 88086, 99720, 117448, 132129, 132960, 146810, 176172, 199440, 220215, 234896, 264258, 293620, 352344, 398880, 440430, 469792, 528516, 587240, 660645, 704688, 880860, 1057032, 1174480, 1321290, 1409376, 1761720, 2114064, 2348960, 2642580, 3523440, 4228128, 5285160, 7046880, 10570320, 21140640]

約数ペア:

[(1, 21140640), (2, 10570320), (3, 7046880), (4, 5285160), (5, 4228128), (6, 3523440), (8, 2642580), (9, 2348960), (10, 2114064), (12, 1761720), (15, 1409376), (16, 1321290), (18, 1174480), (20, 1057032), (24, 880860), (30, 704688), (32, 660645), (36, 587240), (40, 528516), (45, 469792), (48, 440430), (53, 398880), (60, 352344), (72, 293620), (80, 264258), (90, 234896), (96, 220215), (106, 199440), (120, 176172), (144, 146810), (159, 132960), (160, 132129), (180, 117448), (212, 99720), (240, 88086), (265, 79776), (277, 76320), (288, 73405), (318, 66480), (360, 58724), (424, 49860), (477, 44320), (480, 44043), (530, 39888), (554, 38160), (636, 33240), (720, 29362), (795, 26592), (831, 25440), (848, 24930), (954, 22160), (1060, 19944), (1108, 19080), (1272, 16620), (1385, 15264), (1440, 14681), (1590, 13296), (1662, 12720), (1696, 12465), (1908, 11080), (2120, 9972), (2216, 9540), (2385, 8864), (2493, 8480), (2544, 8310), (2770, 7632), (3180, 6648), (3324, 6360), (3816, 5540), (4155, 5088), (4240, 4986), (4432, 4770)]