21397888

素因数分解:

$2^7\times {\mathrm{349}}^1\times {\mathrm{479}}^1$

素因数の和:842

約数の個数: 32

約数和(自身を含む): 42840000

約数和(自身を除く): 21442112

約数列:

[1, 2, 4, 8, 16, 32, 64, 128, 349, 479, 698, 958, 1396, 1916, 2792, 3832, 5584, 7664, 11168, 15328, 22336, 30656, 44672, 61312, 167171, 334342, 668684, 1337368, 2674736, 5349472, 10698944, 21397888]

約数ペア:

[(1, 21397888), (2, 10698944), (4, 5349472), (8, 2674736), (16, 1337368), (32, 668684), (64, 334342), (128, 167171), (349, 61312), (479, 44672), (698, 30656), (958, 22336), (1396, 15328), (1916, 11168), (2792, 7664), (3832, 5584)]