21186640

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8543}}^1$

素因数の和:8587

約数の個数: 40

約数和(自身を含む): 50853888

約数和(自身を除く): 29667248

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 8543, 17086, 34172, 42715, 68344, 85430, 136688, 170860, 264833, 341720, 529666, 683440, 1059332, 1324165, 2118664, 2648330, 4237328, 5296660, 10593320, 21186640]

約数ペア:

[(1, 21186640), (2, 10593320), (4, 5296660), (5, 4237328), (8, 2648330), (10, 2118664), (16, 1324165), (20, 1059332), (31, 683440), (40, 529666), (62, 341720), (80, 264833), (124, 170860), (155, 136688), (248, 85430), (310, 68344), (496, 42715), (620, 34172), (1240, 17086), (2480, 8543)]