21447325

素因数分解:

$5^2\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{281}}^1$

素因数の和:405

約数の個数: 24

約数和(自身を含む): 27694656

約数和(自身を除く): 6247331

約数列:

[1, 5, 25, 43, 71, 215, 281, 355, 1075, 1405, 1775, 3053, 7025, 12083, 15265, 19951, 60415, 76325, 99755, 302075, 498775, 857893, 4289465, 21447325]

約数ペア:

[(1, 21447325), (5, 4289465), (25, 857893), (43, 498775), (71, 302075), (215, 99755), (281, 76325), (355, 60415), (1075, 19951), (1405, 15265), (1775, 12083), (3053, 7025)]