21275984

素因数分解:

$2^4\times {\mathrm{67}}^1\times {\mathrm{89}}^1\times {\mathrm{223}}^1$

素因数の和:387

約数の個数: 40

約数和(自身を含む): 42497280

約数和(自身を除く): 21221296

約数列:

[1, 2, 4, 8, 16, 67, 89, 134, 178, 223, 268, 356, 446, 536, 712, 892, 1072, 1424, 1784, 3568, 5963, 11926, 14941, 19847, 23852, 29882, 39694, 47704, 59764, 79388, 95408, 119528, 158776, 239056, 317552, 1329749, 2659498, 5318996, 10637992, 21275984]

約数ペア:

[(1, 21275984), (2, 10637992), (4, 5318996), (8, 2659498), (16, 1329749), (67, 317552), (89, 239056), (134, 158776), (178, 119528), (223, 95408), (268, 79388), (356, 59764), (446, 47704), (536, 39694), (712, 29882), (892, 23852), (1072, 19847), (1424, 14941), (1784, 11926), (3568, 5963)]