20981664

素因数分解:

$2^5\times 3^2\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{179}}^1$

素因数の和:243

約数の個数: 144

約数和(自身を含む): 67223520

約数和(自身を除く): 46241856

約数列:

[1, 2, 3, 4, 6, 8, 9, 11, 12, 16, 18, 22, 24, 32, 33, 36, 37, 44, 48, 66, 72, 74, 88, 96, 99, 111, 132, 144, 148, 176, 179, 198, 222, 264, 288, 296, 333, 352, 358, 396, 407, 444, 528, 537, 592, 666, 716, 792, 814, 888, 1056, 1074, 1184, 1221, 1332, 1432, 1584, 1611, 1628, 1776, 1969, 2148, 2442, 2664, 2864, 3168, 3222, 3256, 3552, 3663, 3938, 4296, 4884, 5328, 5728, 5907, 6444, 6512, 6623, 7326, 7876, 8592, 9768, 10656, 11814, 12888, 13024, 13246, 14652, 15752, 17184, 17721, 19536, 19869, 23628, 25776, 26492, 29304, 31504, 35442, 39072, 39738, 47256, 51552, 52984, 58608, 59607, 63008, 70884, 72853, 79476, 94512, 105968, 117216, 119214, 141768, 145706, 158952, 189024, 211936, 218559, 238428, 283536, 291412, 317904, 437118, 476856, 567072, 582824, 635808, 655677, 874236, 953712, 1165648, 1311354, 1748472, 1907424, 2331296, 2622708, 3496944, 5245416, 6993888, 10490832, 20981664]

約数ペア:

[(1, 20981664), (2, 10490832), (3, 6993888), (4, 5245416), (6, 3496944), (8, 2622708), (9, 2331296), (11, 1907424), (12, 1748472), (16, 1311354), (18, 1165648), (22, 953712), (24, 874236), (32, 655677), (33, 635808), (36, 582824), (37, 567072), (44, 476856), (48, 437118), (66, 317904), (72, 291412), (74, 283536), (88, 238428), (96, 218559), (99, 211936), (111, 189024), (132, 158952), (144, 145706), (148, 141768), (176, 119214), (179, 117216), (198, 105968), (222, 94512), (264, 79476), (288, 72853), (296, 70884), (333, 63008), (352, 59607), (358, 58608), (396, 52984), (407, 51552), (444, 47256), (528, 39738), (537, 39072), (592, 35442), (666, 31504), (716, 29304), (792, 26492), (814, 25776), (888, 23628), (1056, 19869), (1074, 19536), (1184, 17721), (1221, 17184), (1332, 15752), (1432, 14652), (1584, 13246), (1611, 13024), (1628, 12888), (1776, 11814), (1969, 10656), (2148, 9768), (2442, 8592), (2664, 7876), (2864, 7326), (3168, 6623), (3222, 6512), (3256, 6444), (3552, 5907), (3663, 5728), (3938, 5328), (4296, 4884)]