21079728

素因数分解:

$2^4\times 3^2\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{109}}^1$

素因数の和:219

約数の個数: 120

約数和(自身を含む): 63835200

約数和(自身を除く): 42755472

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 17, 18, 24, 34, 36, 48, 51, 68, 72, 79, 102, 109, 136, 144, 153, 158, 204, 218, 237, 272, 306, 316, 327, 408, 436, 474, 612, 632, 654, 711, 816, 872, 948, 981, 1224, 1264, 1308, 1343, 1422, 1744, 1853, 1896, 1962, 2448, 2616, 2686, 2844, 3706, 3792, 3924, 4029, 5232, 5372, 5559, 5688, 7412, 7848, 8058, 8611, 10744, 11118, 11376, 12087, 14824, 15696, 16116, 16677, 17222, 21488, 22236, 24174, 25833, 29648, 32232, 33354, 34444, 44472, 48348, 51666, 64464, 66708, 68888, 77499, 88944, 96696, 103332, 133416, 137776, 146387, 154998, 193392, 206664, 266832, 292774, 309996, 413328, 439161, 585548, 619992, 878322, 1171096, 1239984, 1317483, 1756644, 2342192, 2634966, 3513288, 5269932, 7026576, 10539864, 21079728]

約数ペア:

[(1, 21079728), (2, 10539864), (3, 7026576), (4, 5269932), (6, 3513288), (8, 2634966), (9, 2342192), (12, 1756644), (16, 1317483), (17, 1239984), (18, 1171096), (24, 878322), (34, 619992), (36, 585548), (48, 439161), (51, 413328), (68, 309996), (72, 292774), (79, 266832), (102, 206664), (109, 193392), (136, 154998), (144, 146387), (153, 137776), (158, 133416), (204, 103332), (218, 96696), (237, 88944), (272, 77499), (306, 68888), (316, 66708), (327, 64464), (408, 51666), (436, 48348), (474, 44472), (612, 34444), (632, 33354), (654, 32232), (711, 29648), (816, 25833), (872, 24174), (948, 22236), (981, 21488), (1224, 17222), (1264, 16677), (1308, 16116), (1343, 15696), (1422, 14824), (1744, 12087), (1853, 11376), (1896, 11118), (1962, 10744), (2448, 8611), (2616, 8058), (2686, 7848), (2844, 7412), (3706, 5688), (3792, 5559), (3924, 5372), (4029, 5232)]