21238672

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{503}}^1$

素因数の和:560

約数の個数: 80

約数和(自身を含む): 52496640

約数和(自身を除く): 31257968

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 29, 52, 56, 58, 91, 104, 112, 116, 182, 203, 208, 232, 364, 377, 406, 464, 503, 728, 754, 812, 1006, 1456, 1508, 1624, 2012, 2639, 3016, 3248, 3521, 4024, 5278, 6032, 6539, 7042, 8048, 10556, 13078, 14084, 14587, 21112, 26156, 28168, 29174, 42224, 45773, 52312, 56336, 58348, 91546, 102109, 104624, 116696, 183092, 189631, 204218, 233392, 366184, 379262, 408436, 732368, 758524, 816872, 1327417, 1517048, 1633744, 2654834, 3034096, 5309668, 10619336, 21238672]

約数ペア:

[(1, 21238672), (2, 10619336), (4, 5309668), (7, 3034096), (8, 2654834), (13, 1633744), (14, 1517048), (16, 1327417), (26, 816872), (28, 758524), (29, 732368), (52, 408436), (56, 379262), (58, 366184), (91, 233392), (104, 204218), (112, 189631), (116, 183092), (182, 116696), (203, 104624), (208, 102109), (232, 91546), (364, 58348), (377, 56336), (406, 52312), (464, 45773), (503, 42224), (728, 29174), (754, 28168), (812, 26156), (1006, 21112), (1456, 14587), (1508, 14084), (1624, 13078), (2012, 10556), (2639, 8048), (3016, 7042), (3248, 6539), (3521, 6032), (4024, 5278)]