20566640

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8293}}^1$

素因数の和:8337

約数の個数: 40

約数和(自身を含む): 49365888

約数和(自身を除く): 28799248

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 8293, 16586, 33172, 41465, 66344, 82930, 132688, 165860, 257083, 331720, 514166, 663440, 1028332, 1285415, 2056664, 2570830, 4113328, 5141660, 10283320, 20566640]

約数ペア:

[(1, 20566640), (2, 10283320), (4, 5141660), (5, 4113328), (8, 2570830), (10, 2056664), (16, 1285415), (20, 1028332), (31, 663440), (40, 514166), (62, 331720), (80, 257083), (124, 165860), (155, 132688), (248, 82930), (310, 66344), (496, 41465), (620, 33172), (1240, 16586), (2480, 8293)]