20789776

素因数分解:

$2^4\times 7^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{179}}^1$

素因数の和:272

約数の個数: 80

約数和(自身を含む): 49818240

約数和(自身を除く): 29028464

約数列:

[1, 2, 4, 7, 8, 14, 16, 17, 28, 34, 56, 61, 68, 112, 119, 122, 136, 179, 238, 244, 272, 358, 427, 476, 488, 716, 854, 952, 976, 1037, 1253, 1432, 1708, 1904, 2074, 2506, 2864, 3043, 3416, 4148, 5012, 6086, 6832, 7259, 8296, 10024, 10919, 12172, 14518, 16592, 20048, 21301, 21838, 24344, 29036, 42602, 43676, 48688, 58072, 76433, 85204, 87352, 116144, 152866, 170408, 174704, 185623, 305732, 340816, 371246, 611464, 742492, 1222928, 1299361, 1484984, 2598722, 2969968, 5197444, 10394888, 20789776]

約数ペア:

[(1, 20789776), (2, 10394888), (4, 5197444), (7, 2969968), (8, 2598722), (14, 1484984), (16, 1299361), (17, 1222928), (28, 742492), (34, 611464), (56, 371246), (61, 340816), (68, 305732), (112, 185623), (119, 174704), (122, 170408), (136, 152866), (179, 116144), (238, 87352), (244, 85204), (272, 76433), (358, 58072), (427, 48688), (476, 43676), (488, 42602), (716, 29036), (854, 24344), (952, 21838), (976, 21301), (1037, 20048), (1253, 16592), (1432, 14518), (1708, 12172), (1904, 10919), (2074, 10024), (2506, 8296), (2864, 7259), (3043, 6832), (3416, 6086), (4148, 5012)]