20686440

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{211}}^1$

素因数の和:287

約数の個数: 128

約数和(自身を含む): 67161600

約数和(自身を除く): 46475160

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 19, 20, 24, 30, 38, 40, 43, 57, 60, 76, 86, 95, 114, 120, 129, 152, 172, 190, 211, 215, 228, 258, 285, 344, 380, 422, 430, 456, 516, 570, 633, 645, 760, 817, 844, 860, 1032, 1055, 1140, 1266, 1290, 1634, 1688, 1720, 2110, 2280, 2451, 2532, 2580, 3165, 3268, 4009, 4085, 4220, 4902, 5064, 5160, 6330, 6536, 8018, 8170, 8440, 9073, 9804, 12027, 12255, 12660, 16036, 16340, 18146, 19608, 20045, 24054, 24510, 25320, 27219, 32072, 32680, 36292, 40090, 45365, 48108, 49020, 54438, 60135, 72584, 80180, 90730, 96216, 98040, 108876, 120270, 136095, 160360, 172387, 181460, 217752, 240540, 272190, 344774, 362920, 481080, 517161, 544380, 689548, 861935, 1034322, 1088760, 1379096, 1723870, 2068644, 2585805, 3447740, 4137288, 5171610, 6895480, 10343220, 20686440]

約数ペア:

[(1, 20686440), (2, 10343220), (3, 6895480), (4, 5171610), (5, 4137288), (6, 3447740), (8, 2585805), (10, 2068644), (12, 1723870), (15, 1379096), (19, 1088760), (20, 1034322), (24, 861935), (30, 689548), (38, 544380), (40, 517161), (43, 481080), (57, 362920), (60, 344774), (76, 272190), (86, 240540), (95, 217752), (114, 181460), (120, 172387), (129, 160360), (152, 136095), (172, 120270), (190, 108876), (211, 98040), (215, 96216), (228, 90730), (258, 80180), (285, 72584), (344, 60135), (380, 54438), (422, 49020), (430, 48108), (456, 45365), (516, 40090), (570, 36292), (633, 32680), (645, 32072), (760, 27219), (817, 25320), (844, 24510), (860, 24054), (1032, 20045), (1055, 19608), (1140, 18146), (1266, 16340), (1290, 16036), (1634, 12660), (1688, 12255), (1720, 12027), (2110, 9804), (2280, 9073), (2451, 8440), (2532, 8170), (2580, 8018), (3165, 6536), (3268, 6330), (4009, 5160), (4085, 5064), (4220, 4902)]