21291361480

素因数分解:

$2^3\times 5^1\times {\mathrm{2153}}^1\times {\mathrm{247229}}^1$

素因数の和:249393

約数の個数: 32

約数和(自身を含む): 47928007800

約数和(自身を除く): 26636646320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2153, 4306, 8612, 10765, 17224, 21530, 43060, 86120, 247229, 494458, 988916, 1236145, 1977832, 2472290, 4944580, 9889160, 532284037, 1064568074, 2129136148, 2661420185, 4258272296, 5322840370, 10645680740, 21291361480]

約数ペア:

[(1, 21291361480), (2, 10645680740), (4, 5322840370), (5, 4258272296), (8, 2661420185), (10, 2129136148), (20, 1064568074), (40, 532284037), (2153, 9889160), (4306, 4944580), (8612, 2472290), (10765, 1977832), (17224, 1236145), (21530, 988916), (43060, 494458), (86120, 247229)]