21260770

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{167}}^1\times {\mathrm{439}}^1$

素因数の和:642

約数の個数: 32

約数和(自身を含む): 39916800

約数和(自身を除く): 18656030

約数列:

[1, 2, 5, 10, 29, 58, 145, 167, 290, 334, 439, 835, 878, 1670, 2195, 4390, 4843, 9686, 12731, 24215, 25462, 48430, 63655, 73313, 127310, 146626, 366565, 733130, 2126077, 4252154, 10630385, 21260770]

約数ペア:

[(1, 21260770), (2, 10630385), (5, 4252154), (10, 2126077), (29, 733130), (58, 366565), (145, 146626), (167, 127310), (290, 73313), (334, 63655), (439, 48430), (835, 25462), (878, 24215), (1670, 12731), (2195, 9686), (4390, 4843)]