25821980

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{173}}^1\times {\mathrm{439}}^1$

素因数の和:638

約数の個数: 48

約数和(自身を含む): 57879360

約数和(自身を除く): 32057380

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 173, 340, 346, 439, 692, 865, 878, 1730, 1756, 2195, 2941, 3460, 4390, 5882, 7463, 8780, 11764, 14705, 14926, 29410, 29852, 37315, 58820, 74630, 75947, 149260, 151894, 303788, 379735, 759470, 1291099, 1518940, 2582198, 5164396, 6455495, 12910990, 25821980]

約数ペア:

[(1, 25821980), (2, 12910990), (4, 6455495), (5, 5164396), (10, 2582198), (17, 1518940), (20, 1291099), (34, 759470), (68, 379735), (85, 303788), (170, 151894), (173, 149260), (340, 75947), (346, 74630), (439, 58820), (692, 37315), (865, 29852), (878, 29410), (1730, 14926), (1756, 14705), (2195, 11764), (2941, 8780), (3460, 7463), (4390, 5882)]