21971208

素因数分解:

$2^3\times 3^1\times 7^3\times {\mathrm{17}}^1\times {\mathrm{157}}^1$

素因数の和:204

約数の個数: 128

約数和(自身を含む): 68256000

約数和(自身を除く): 46284792

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 14, 17, 21, 24, 28, 34, 42, 49, 51, 56, 68, 84, 98, 102, 119, 136, 147, 157, 168, 196, 204, 238, 294, 314, 343, 357, 392, 408, 471, 476, 588, 628, 686, 714, 833, 942, 952, 1029, 1099, 1176, 1256, 1372, 1428, 1666, 1884, 2058, 2198, 2499, 2669, 2744, 2856, 3297, 3332, 3768, 4116, 4396, 4998, 5338, 5831, 6594, 6664, 7693, 8007, 8232, 8792, 9996, 10676, 11662, 13188, 15386, 16014, 17493, 18683, 19992, 21352, 23079, 23324, 26376, 30772, 32028, 34986, 37366, 46158, 46648, 53851, 56049, 61544, 64056, 69972, 74732, 92316, 107702, 112098, 130781, 139944, 149464, 161553, 184632, 215404, 224196, 261562, 323106, 392343, 430808, 448392, 523124, 646212, 784686, 915467, 1046248, 1292424, 1569372, 1830934, 2746401, 3138744, 3661868, 5492802, 7323736, 10985604, 21971208]

約数ペア:

[(1, 21971208), (2, 10985604), (3, 7323736), (4, 5492802), (6, 3661868), (7, 3138744), (8, 2746401), (12, 1830934), (14, 1569372), (17, 1292424), (21, 1046248), (24, 915467), (28, 784686), (34, 646212), (42, 523124), (49, 448392), (51, 430808), (56, 392343), (68, 323106), (84, 261562), (98, 224196), (102, 215404), (119, 184632), (136, 161553), (147, 149464), (157, 139944), (168, 130781), (196, 112098), (204, 107702), (238, 92316), (294, 74732), (314, 69972), (343, 64056), (357, 61544), (392, 56049), (408, 53851), (471, 46648), (476, 46158), (588, 37366), (628, 34986), (686, 32028), (714, 30772), (833, 26376), (942, 23324), (952, 23079), (1029, 21352), (1099, 19992), (1176, 18683), (1256, 17493), (1372, 16014), (1428, 15386), (1666, 13188), (1884, 11662), (2058, 10676), (2198, 9996), (2499, 8792), (2669, 8232), (2744, 8007), (2856, 7693), (3297, 6664), (3332, 6594), (3768, 5831), (4116, 5338), (4396, 4998)]