21679120

素因数分解:

$2^4\times 5^1\times {\mathrm{53}}^1\times {\mathrm{5113}}^1$

素因数の和:5179

約数の個数: 40

約数和(自身を含む): 51365016

約数和(自身を除く): 29685896

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 53, 80, 106, 212, 265, 424, 530, 848, 1060, 2120, 4240, 5113, 10226, 20452, 25565, 40904, 51130, 81808, 102260, 204520, 270989, 409040, 541978, 1083956, 1354945, 2167912, 2709890, 4335824, 5419780, 10839560, 21679120]

約数ペア:

[(1, 21679120), (2, 10839560), (4, 5419780), (5, 4335824), (8, 2709890), (10, 2167912), (16, 1354945), (20, 1083956), (40, 541978), (53, 409040), (80, 270989), (106, 204520), (212, 102260), (265, 81808), (424, 51130), (530, 40904), (848, 25565), (1060, 20452), (2120, 10226), (4240, 5113)]