21561984

素因数分解:

$2^7\times 3^3\times {\mathrm{17}}^1\times {\mathrm{367}}^1$

素因数の和:407

約数の個数: 128

約数和(自身を含む): 67564800

約数和(自身を除く): 46002816

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 17, 18, 24, 27, 32, 34, 36, 48, 51, 54, 64, 68, 72, 96, 102, 108, 128, 136, 144, 153, 192, 204, 216, 272, 288, 306, 367, 384, 408, 432, 459, 544, 576, 612, 734, 816, 864, 918, 1088, 1101, 1152, 1224, 1468, 1632, 1728, 1836, 2176, 2202, 2448, 2936, 3264, 3303, 3456, 3672, 4404, 4896, 5872, 6239, 6528, 6606, 7344, 8808, 9792, 9909, 11744, 12478, 13212, 14688, 17616, 18717, 19584, 19818, 23488, 24956, 26424, 29376, 35232, 37434, 39636, 46976, 49912, 52848, 56151, 58752, 70464, 74868, 79272, 99824, 105696, 112302, 140928, 149736, 158544, 168453, 199648, 211392, 224604, 299472, 317088, 336906, 399296, 422784, 449208, 598944, 634176, 673812, 798592, 898416, 1197888, 1268352, 1347624, 1796832, 2395776, 2695248, 3593664, 5390496, 7187328, 10780992, 21561984]

約数ペア:

[(1, 21561984), (2, 10780992), (3, 7187328), (4, 5390496), (6, 3593664), (8, 2695248), (9, 2395776), (12, 1796832), (16, 1347624), (17, 1268352), (18, 1197888), (24, 898416), (27, 798592), (32, 673812), (34, 634176), (36, 598944), (48, 449208), (51, 422784), (54, 399296), (64, 336906), (68, 317088), (72, 299472), (96, 224604), (102, 211392), (108, 199648), (128, 168453), (136, 158544), (144, 149736), (153, 140928), (192, 112302), (204, 105696), (216, 99824), (272, 79272), (288, 74868), (306, 70464), (367, 58752), (384, 56151), (408, 52848), (432, 49912), (459, 46976), (544, 39636), (576, 37434), (612, 35232), (734, 29376), (816, 26424), (864, 24956), (918, 23488), (1088, 19818), (1101, 19584), (1152, 18717), (1224, 17616), (1468, 14688), (1632, 13212), (1728, 12478), (1836, 11744), (2176, 9909), (2202, 9792), (2448, 8808), (2936, 7344), (3264, 6606), (3303, 6528), (3456, 6239), (3672, 5872), (4404, 4896)]