21329740

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{521}}^1$

素因数の和:642

約数の個数: 48

約数和(自身を含む): 47355840

約数和(自身を除く): 26026100

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 89, 92, 115, 178, 230, 356, 445, 460, 521, 890, 1042, 1780, 2047, 2084, 2605, 4094, 5210, 8188, 10235, 10420, 11983, 20470, 23966, 40940, 46369, 47932, 59915, 92738, 119830, 185476, 231845, 239660, 463690, 927380, 1066487, 2132974, 4265948, 5332435, 10664870, 21329740]

約数ペア:

[(1, 21329740), (2, 10664870), (4, 5332435), (5, 4265948), (10, 2132974), (20, 1066487), (23, 927380), (46, 463690), (89, 239660), (92, 231845), (115, 185476), (178, 119830), (230, 92738), (356, 59915), (445, 47932), (460, 46369), (521, 40940), (890, 23966), (1042, 20470), (1780, 11983), (2047, 10420), (2084, 10235), (2605, 8188), (4094, 5210)]