21718928

素因数分解:

$2^4\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^2\times {\mathrm{61}}^1$

素因数の和:121

約数の個数: 120

約数和(自身を含む): 56645184

約数和(自身を除く): 34926256

約数列:

[1, 2, 4, 7, 8, 11, 14, 16, 17, 22, 28, 34, 44, 56, 61, 68, 77, 88, 112, 119, 122, 136, 154, 176, 187, 238, 244, 272, 289, 308, 374, 427, 476, 488, 578, 616, 671, 748, 854, 952, 976, 1037, 1156, 1232, 1309, 1342, 1496, 1708, 1904, 2023, 2074, 2312, 2618, 2684, 2992, 3179, 3416, 4046, 4148, 4624, 4697, 5236, 5368, 6358, 6832, 7259, 8092, 8296, 9394, 10472, 10736, 11407, 12716, 14518, 16184, 16592, 17629, 18788, 20944, 22253, 22814, 25432, 29036, 32368, 35258, 37576, 44506, 45628, 50864, 58072, 70516, 75152, 79849, 89012, 91256, 116144, 123403, 141032, 159698, 178024, 182512, 193919, 246806, 282064, 319396, 356048, 387838, 493612, 638792, 775676, 987224, 1277584, 1357433, 1551352, 1974448, 2714866, 3102704, 5429732, 10859464, 21718928]

約数ペア:

[(1, 21718928), (2, 10859464), (4, 5429732), (7, 3102704), (8, 2714866), (11, 1974448), (14, 1551352), (16, 1357433), (17, 1277584), (22, 987224), (28, 775676), (34, 638792), (44, 493612), (56, 387838), (61, 356048), (68, 319396), (77, 282064), (88, 246806), (112, 193919), (119, 182512), (122, 178024), (136, 159698), (154, 141032), (176, 123403), (187, 116144), (238, 91256), (244, 89012), (272, 79849), (289, 75152), (308, 70516), (374, 58072), (427, 50864), (476, 45628), (488, 44506), (578, 37576), (616, 35258), (671, 32368), (748, 29036), (854, 25432), (952, 22814), (976, 22253), (1037, 20944), (1156, 18788), (1232, 17629), (1309, 16592), (1342, 16184), (1496, 14518), (1708, 12716), (1904, 11407), (2023, 10736), (2074, 10472), (2312, 9394), (2618, 8296), (2684, 8092), (2992, 7259), (3179, 6832), (3416, 6358), (4046, 5368), (4148, 5236), (4624, 4697)]