21065072

素因数分解:

$2^4\times 7^1\times {\mathrm{19}}^2\times {\mathrm{521}}^1$

素因数の和:574

約数の個数: 60

約数和(自身を含む): 49322736

約数和(自身を除く): 28257664

約数列:

[1, 2, 4, 7, 8, 14, 16, 19, 28, 38, 56, 76, 112, 133, 152, 266, 304, 361, 521, 532, 722, 1042, 1064, 1444, 2084, 2128, 2527, 2888, 3647, 4168, 5054, 5776, 7294, 8336, 9899, 10108, 14588, 19798, 20216, 29176, 39596, 40432, 58352, 69293, 79192, 138586, 158384, 188081, 277172, 376162, 554344, 752324, 1108688, 1316567, 1504648, 2633134, 3009296, 5266268, 10532536, 21065072]

約数ペア:

[(1, 21065072), (2, 10532536), (4, 5266268), (7, 3009296), (8, 2633134), (14, 1504648), (16, 1316567), (19, 1108688), (28, 752324), (38, 554344), (56, 376162), (76, 277172), (112, 188081), (133, 158384), (152, 138586), (266, 79192), (304, 69293), (361, 58352), (521, 40432), (532, 39596), (722, 29176), (1042, 20216), (1064, 19798), (1444, 14588), (2084, 10108), (2128, 9899), (2527, 8336), (2888, 7294), (3647, 5776), (4168, 5054)]