21619640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{77213}}^1$

素因数の和:77231

約数の個数: 32

約数和(自身を含む): 55594080

約数和(自身を除く): 33974440

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 77213, 154426, 308852, 386065, 540491, 617704, 772130, 1080982, 1544260, 2161964, 2702455, 3088520, 4323928, 5404910, 10809820, 21619640]

約数ペア:

[(1, 21619640), (2, 10809820), (4, 5404910), (5, 4323928), (7, 3088520), (8, 2702455), (10, 2161964), (14, 1544260), (20, 1080982), (28, 772130), (35, 617704), (40, 540491), (56, 386065), (70, 308852), (140, 154426), (280, 77213)]