21128212

素因数分解:

$2^2\times 7^2\times {\mathrm{17}}^2\times {\mathrm{373}}^1$

素因数の和:425

約数の個数: 54

約数和(自身を含む): 45812382

約数和(自身を除く): 24684170

約数列:

[1, 2, 4, 7, 14, 17, 28, 34, 49, 68, 98, 119, 196, 238, 289, 373, 476, 578, 746, 833, 1156, 1492, 1666, 2023, 2611, 3332, 4046, 5222, 6341, 8092, 10444, 12682, 14161, 18277, 25364, 28322, 36554, 44387, 56644, 73108, 88774, 107797, 177548, 215594, 310709, 431188, 621418, 754579, 1242836, 1509158, 3018316, 5282053, 10564106, 21128212]

約数ペア:

[(1, 21128212), (2, 10564106), (4, 5282053), (7, 3018316), (14, 1509158), (17, 1242836), (28, 754579), (34, 621418), (49, 431188), (68, 310709), (98, 215594), (119, 177548), (196, 107797), (238, 88774), (289, 73108), (373, 56644), (476, 44387), (578, 36554), (746, 28322), (833, 25364), (1156, 18277), (1492, 14161), (1666, 12682), (2023, 10444), (2611, 8092), (3332, 6341), (4046, 5222)]