20725920

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{389}}^1$

素因数の和:447

約数の個数: 144

約数和(自身を含む): 72825480

約数和(自身を除く): 52099560

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 37, 40, 45, 48, 60, 72, 74, 80, 90, 96, 111, 120, 144, 148, 160, 180, 185, 222, 240, 288, 296, 333, 360, 370, 389, 444, 480, 555, 592, 666, 720, 740, 778, 888, 1110, 1167, 1184, 1332, 1440, 1480, 1556, 1665, 1776, 1945, 2220, 2334, 2664, 2960, 3112, 3330, 3501, 3552, 3890, 4440, 4668, 5328, 5835, 5920, 6224, 6660, 7002, 7780, 8880, 9336, 10656, 11670, 12448, 13320, 14004, 14393, 15560, 17505, 17760, 18672, 23340, 26640, 28008, 28786, 31120, 35010, 37344, 43179, 46680, 53280, 56016, 57572, 62240, 70020, 71965, 86358, 93360, 112032, 115144, 129537, 140040, 143930, 172716, 186720, 215895, 230288, 259074, 280080, 287860, 345432, 431790, 460576, 518148, 560160, 575720, 647685, 690864, 863580, 1036296, 1151440, 1295370, 1381728, 1727160, 2072592, 2302880, 2590740, 3454320, 4145184, 5181480, 6908640, 10362960, 20725920]

約数ペア:

[(1, 20725920), (2, 10362960), (3, 6908640), (4, 5181480), (5, 4145184), (6, 3454320), (8, 2590740), (9, 2302880), (10, 2072592), (12, 1727160), (15, 1381728), (16, 1295370), (18, 1151440), (20, 1036296), (24, 863580), (30, 690864), (32, 647685), (36, 575720), (37, 560160), (40, 518148), (45, 460576), (48, 431790), (60, 345432), (72, 287860), (74, 280080), (80, 259074), (90, 230288), (96, 215895), (111, 186720), (120, 172716), (144, 143930), (148, 140040), (160, 129537), (180, 115144), (185, 112032), (222, 93360), (240, 86358), (288, 71965), (296, 70020), (333, 62240), (360, 57572), (370, 56016), (389, 53280), (444, 46680), (480, 43179), (555, 37344), (592, 35010), (666, 31120), (720, 28786), (740, 28008), (778, 26640), (888, 23340), (1110, 18672), (1167, 17760), (1184, 17505), (1332, 15560), (1440, 14393), (1480, 14004), (1556, 13320), (1665, 12448), (1776, 11670), (1945, 10656), (2220, 9336), (2334, 8880), (2664, 7780), (2960, 7002), (3112, 6660), (3330, 6224), (3501, 5920), (3552, 5835), (3890, 5328), (4440, 4668)]