19500720

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{193}}^1\times {\mathrm{421}}^1$

素因数の和:630

約数の個数: 80

約数和(自身を含む): 60909792

約数和(自身を除く): 41409072

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 193, 240, 386, 421, 579, 772, 842, 965, 1158, 1263, 1544, 1684, 1930, 2105, 2316, 2526, 2895, 3088, 3368, 3860, 4210, 4632, 5052, 5790, 6315, 6736, 7720, 8420, 9264, 10104, 11580, 12630, 15440, 16840, 20208, 23160, 25260, 33680, 46320, 50520, 81253, 101040, 162506, 243759, 325012, 406265, 487518, 650024, 812530, 975036, 1218795, 1300048, 1625060, 1950072, 2437590, 3250120, 3900144, 4875180, 6500240, 9750360, 19500720]

約数ペア:

[(1, 19500720), (2, 9750360), (3, 6500240), (4, 4875180), (5, 3900144), (6, 3250120), (8, 2437590), (10, 1950072), (12, 1625060), (15, 1300048), (16, 1218795), (20, 975036), (24, 812530), (30, 650024), (40, 487518), (48, 406265), (60, 325012), (80, 243759), (120, 162506), (193, 101040), (240, 81253), (386, 50520), (421, 46320), (579, 33680), (772, 25260), (842, 23160), (965, 20208), (1158, 16840), (1263, 15440), (1544, 12630), (1684, 11580), (1930, 10104), (2105, 9264), (2316, 8420), (2526, 7720), (2895, 6736), (3088, 6315), (3368, 5790), (3860, 5052), (4210, 4632)]