1291213720

素因数分解:

$2^3\times 5^1\times {\mathrm{571}}^1\times {\mathrm{56533}}^1$

素因数の和:57115

約数の個数: 32

約数和(自身を含む): 2910370320

約数和(自身を除く): 1619156600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 571, 1142, 2284, 2855, 4568, 5710, 11420, 22840, 56533, 113066, 226132, 282665, 452264, 565330, 1130660, 2261320, 32280343, 64560686, 129121372, 161401715, 258242744, 322803430, 645606860, 1291213720]

約数ペア:

[(1, 1291213720), (2, 645606860), (4, 322803430), (5, 258242744), (8, 161401715), (10, 129121372), (20, 64560686), (40, 32280343), (571, 2261320), (1142, 1130660), (2284, 565330), (2855, 452264), (4568, 282665), (5710, 226132), (11420, 113066), (22840, 56533)]