18727720

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{1373}}^1$

素因数の和:1426

約数の個数: 64

約数和(自身を含む): 47485440

約数和(自身を除く): 28757720

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 31, 40, 44, 55, 62, 88, 110, 124, 155, 220, 248, 310, 341, 440, 620, 682, 1240, 1364, 1373, 1705, 2728, 2746, 3410, 5492, 6820, 6865, 10984, 13640, 13730, 15103, 27460, 30206, 42563, 54920, 60412, 75515, 85126, 120824, 151030, 170252, 212815, 302060, 340504, 425630, 468193, 604120, 851260, 936386, 1702520, 1872772, 2340965, 3745544, 4681930, 9363860, 18727720]

約数ペア:

[(1, 18727720), (2, 9363860), (4, 4681930), (5, 3745544), (8, 2340965), (10, 1872772), (11, 1702520), (20, 936386), (22, 851260), (31, 604120), (40, 468193), (44, 425630), (55, 340504), (62, 302060), (88, 212815), (110, 170252), (124, 151030), (155, 120824), (220, 85126), (248, 75515), (310, 60412), (341, 54920), (440, 42563), (620, 30206), (682, 27460), (1240, 15103), (1364, 13730), (1373, 13640), (1705, 10984), (2728, 6865), (2746, 6820), (3410, 5492)]