20287640

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{16361}}^1$

素因数の和:16403

約数の個数: 32

約数和(自身を含む): 47122560

約数和(自身を除く): 26834920

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 16361, 32722, 65444, 81805, 130888, 163610, 327220, 507191, 654440, 1014382, 2028764, 2535955, 4057528, 5071910, 10143820, 20287640]

約数ペア:

[(1, 20287640), (2, 10143820), (4, 5071910), (5, 4057528), (8, 2535955), (10, 2028764), (20, 1014382), (31, 654440), (40, 507191), (62, 327220), (124, 163610), (155, 130888), (248, 81805), (310, 65444), (620, 32722), (1240, 16361)]