20108571

素因数分解:

$3^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{89}}^1$

素因数の和:188

約数の個数: 48

約数和(自身を含む): 33242400

約数和(自身を除く): 13133829

約数列:

[1, 3, 7, 21, 29, 49, 53, 87, 89, 147, 159, 203, 267, 371, 609, 623, 1113, 1421, 1537, 1869, 2581, 2597, 4263, 4361, 4611, 4717, 7743, 7791, 10759, 13083, 14151, 18067, 32277, 33019, 54201, 75313, 99057, 126469, 136793, 225939, 231133, 379407, 410379, 693399, 957551, 2872653, 6702857, 20108571]

約数ペア:

[(1, 20108571), (3, 6702857), (7, 2872653), (21, 957551), (29, 693399), (49, 410379), (53, 379407), (87, 231133), (89, 225939), (147, 136793), (159, 126469), (203, 99057), (267, 75313), (371, 54201), (609, 33019), (623, 32277), (1113, 18067), (1421, 14151), (1537, 13083), (1869, 10759), (2581, 7791), (2597, 7743), (4263, 4717), (4361, 4611)]