21640728

素因数分解:

$2^3\times 3^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1$

素因数の和:145

約数の個数: 128

約数和(自身を含む): 62208000

約数和(自身を除く): 40567272

約数列:

[1, 2, 3, 4, 6, 8, 12, 17, 24, 29, 31, 34, 51, 58, 59, 62, 68, 87, 93, 102, 116, 118, 124, 136, 174, 177, 186, 204, 232, 236, 248, 348, 354, 372, 408, 472, 493, 527, 696, 708, 744, 899, 986, 1003, 1054, 1416, 1479, 1581, 1711, 1798, 1829, 1972, 2006, 2108, 2697, 2958, 3009, 3162, 3422, 3596, 3658, 3944, 4012, 4216, 5133, 5394, 5487, 5916, 6018, 6324, 6844, 7192, 7316, 8024, 10266, 10788, 10974, 11832, 12036, 12648, 13688, 14632, 15283, 20532, 21576, 21948, 24072, 29087, 30566, 31093, 41064, 43896, 45849, 53041, 58174, 61132, 62186, 87261, 91698, 93279, 106082, 116348, 122264, 124372, 159123, 174522, 183396, 186558, 212164, 232696, 248744, 318246, 349044, 366792, 373116, 424328, 636492, 698088, 746232, 901697, 1272984, 1803394, 2705091, 3606788, 5410182, 7213576, 10820364, 21640728]

約数ペア:

[(1, 21640728), (2, 10820364), (3, 7213576), (4, 5410182), (6, 3606788), (8, 2705091), (12, 1803394), (17, 1272984), (24, 901697), (29, 746232), (31, 698088), (34, 636492), (51, 424328), (58, 373116), (59, 366792), (62, 349044), (68, 318246), (87, 248744), (93, 232696), (102, 212164), (116, 186558), (118, 183396), (124, 174522), (136, 159123), (174, 124372), (177, 122264), (186, 116348), (204, 106082), (232, 93279), (236, 91698), (248, 87261), (348, 62186), (354, 61132), (372, 58174), (408, 53041), (472, 45849), (493, 43896), (527, 41064), (696, 31093), (708, 30566), (744, 29087), (899, 24072), (986, 21948), (1003, 21576), (1054, 20532), (1416, 15283), (1479, 14632), (1581, 13688), (1711, 12648), (1798, 12036), (1829, 11832), (1972, 10974), (2006, 10788), (2108, 10266), (2697, 8024), (2958, 7316), (3009, 7192), (3162, 6844), (3422, 6324), (3596, 6018), (3658, 5916), (3944, 5487), (4012, 5394), (4216, 5133)]