21407512

素因数分解:

$2^3\times 7^2\times {\mathrm{97}}^1\times {\mathrm{563}}^1$

素因数の和:680

約数の個数: 48

約数和(自身を含む): 47257560

約数和(自身を除く): 25850048

約数列:

[1, 2, 4, 7, 8, 14, 28, 49, 56, 97, 98, 194, 196, 388, 392, 563, 679, 776, 1126, 1358, 2252, 2716, 3941, 4504, 4753, 5432, 7882, 9506, 15764, 19012, 27587, 31528, 38024, 54611, 55174, 109222, 110348, 218444, 220696, 382277, 436888, 764554, 1529108, 2675939, 3058216, 5351878, 10703756, 21407512]

約数ペア:

[(1, 21407512), (2, 10703756), (4, 5351878), (7, 3058216), (8, 2675939), (14, 1529108), (28, 764554), (49, 436888), (56, 382277), (97, 220696), (98, 218444), (194, 110348), (196, 109222), (388, 55174), (392, 54611), (563, 38024), (679, 31528), (776, 27587), (1126, 19012), (1358, 15764), (2252, 9506), (2716, 7882), (3941, 5432), (4504, 4753)]