21950920

素因数分解:

$2^3\times 5^1\times {\mathrm{503}}^1\times {\mathrm{1091}}^1$

素因数の和:1605

約数の個数: 32

約数和(自身を含む): 49533120

約数和(自身を除く): 27582200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 503, 1006, 1091, 2012, 2182, 2515, 4024, 4364, 5030, 5455, 8728, 10060, 10910, 20120, 21820, 43640, 548773, 1097546, 2195092, 2743865, 4390184, 5487730, 10975460, 21950920]

約数ペア:

[(1, 21950920), (2, 10975460), (4, 5487730), (5, 4390184), (8, 2743865), (10, 2195092), (20, 1097546), (40, 548773), (503, 43640), (1006, 21820), (1091, 20120), (2012, 10910), (2182, 10060), (2515, 8728), (4024, 5455), (4364, 5030)]