21557520

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{379}}^1$

素因数の和:477

約数の個数: 120

約数和(自身を含む): 73507200

約数和(自身を除く): 51949680

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 79, 80, 90, 120, 144, 158, 180, 237, 240, 316, 360, 379, 395, 474, 632, 711, 720, 758, 790, 948, 1137, 1185, 1264, 1422, 1516, 1580, 1895, 1896, 2274, 2370, 2844, 3032, 3160, 3411, 3555, 3790, 3792, 4548, 4740, 5685, 5688, 6064, 6320, 6822, 7110, 7580, 9096, 9480, 11370, 11376, 13644, 14220, 15160, 17055, 18192, 18960, 22740, 27288, 28440, 29941, 30320, 34110, 45480, 54576, 56880, 59882, 68220, 89823, 90960, 119764, 136440, 149705, 179646, 239528, 269469, 272880, 299410, 359292, 449115, 479056, 538938, 598820, 718584, 898230, 1077876, 1197640, 1347345, 1437168, 1796460, 2155752, 2395280, 2694690, 3592920, 4311504, 5389380, 7185840, 10778760, 21557520]

約数ペア:

[(1, 21557520), (2, 10778760), (3, 7185840), (4, 5389380), (5, 4311504), (6, 3592920), (8, 2694690), (9, 2395280), (10, 2155752), (12, 1796460), (15, 1437168), (16, 1347345), (18, 1197640), (20, 1077876), (24, 898230), (30, 718584), (36, 598820), (40, 538938), (45, 479056), (48, 449115), (60, 359292), (72, 299410), (79, 272880), (80, 269469), (90, 239528), (120, 179646), (144, 149705), (158, 136440), (180, 119764), (237, 90960), (240, 89823), (316, 68220), (360, 59882), (379, 56880), (395, 54576), (474, 45480), (632, 34110), (711, 30320), (720, 29941), (758, 28440), (790, 27288), (948, 22740), (1137, 18960), (1185, 18192), (1264, 17055), (1422, 15160), (1516, 14220), (1580, 13644), (1895, 11376), (1896, 11370), (2274, 9480), (2370, 9096), (2844, 7580), (3032, 7110), (3160, 6822), (3411, 6320), (3555, 6064), (3790, 5688), (3792, 5685), (4548, 4740)]