20720880

素因数分解:

$2^4\times 3^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{181}}^1$

素因数の和:256

約数の個数: 160

約数和(自身を含む): 73120320

約数和(自身を除く): 52399440

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 27, 30, 36, 40, 45, 48, 53, 54, 60, 72, 80, 90, 106, 108, 120, 135, 144, 159, 180, 181, 212, 216, 240, 265, 270, 318, 360, 362, 424, 432, 477, 530, 540, 543, 636, 720, 724, 795, 848, 905, 954, 1060, 1080, 1086, 1272, 1431, 1448, 1590, 1629, 1810, 1908, 2120, 2160, 2172, 2385, 2544, 2715, 2862, 2896, 3180, 3258, 3620, 3816, 4240, 4344, 4770, 4887, 5430, 5724, 6360, 6516, 7155, 7240, 7632, 8145, 8688, 9540, 9593, 9774, 10860, 11448, 12720, 13032, 14310, 14480, 16290, 19080, 19186, 19548, 21720, 22896, 24435, 26064, 28620, 28779, 32580, 38160, 38372, 39096, 43440, 47965, 48870, 57240, 57558, 65160, 76744, 78192, 86337, 95930, 97740, 114480, 115116, 130320, 143895, 153488, 172674, 191860, 195480, 230232, 259011, 287790, 345348, 383720, 390960, 431685, 460464, 518022, 575580, 690696, 767440, 863370, 1036044, 1151160, 1295055, 1381392, 1726740, 2072088, 2302320, 2590110, 3453480, 4144176, 5180220, 6906960, 10360440, 20720880]

約数ペア:

[(1, 20720880), (2, 10360440), (3, 6906960), (4, 5180220), (5, 4144176), (6, 3453480), (8, 2590110), (9, 2302320), (10, 2072088), (12, 1726740), (15, 1381392), (16, 1295055), (18, 1151160), (20, 1036044), (24, 863370), (27, 767440), (30, 690696), (36, 575580), (40, 518022), (45, 460464), (48, 431685), (53, 390960), (54, 383720), (60, 345348), (72, 287790), (80, 259011), (90, 230232), (106, 195480), (108, 191860), (120, 172674), (135, 153488), (144, 143895), (159, 130320), (180, 115116), (181, 114480), (212, 97740), (216, 95930), (240, 86337), (265, 78192), (270, 76744), (318, 65160), (360, 57558), (362, 57240), (424, 48870), (432, 47965), (477, 43440), (530, 39096), (540, 38372), (543, 38160), (636, 32580), (720, 28779), (724, 28620), (795, 26064), (848, 24435), (905, 22896), (954, 21720), (1060, 19548), (1080, 19186), (1086, 19080), (1272, 16290), (1431, 14480), (1448, 14310), (1590, 13032), (1629, 12720), (1810, 11448), (1908, 10860), (2120, 9774), (2160, 9593), (2172, 9540), (2385, 8688), (2544, 8145), (2715, 7632), (2862, 7240), (2896, 7155), (3180, 6516), (3258, 6360), (3620, 5724), (3816, 5430), (4240, 4887), (4344, 4770)]