21999520

素因数分解:

$2^5\times 5^1\times {\mathrm{359}}^1\times {\mathrm{383}}^1$

素因数の和:757

約数の個数: 48

約数和(自身を含む): 52254720

約数和(自身を除く): 30255200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 359, 383, 718, 766, 1436, 1532, 1795, 1915, 2872, 3064, 3590, 3830, 5744, 6128, 7180, 7660, 11488, 12256, 14360, 15320, 28720, 30640, 57440, 61280, 137497, 274994, 549988, 687485, 1099976, 1374970, 2199952, 2749940, 4399904, 5499880, 10999760, 21999520]

約数ペア:

[(1, 21999520), (2, 10999760), (4, 5499880), (5, 4399904), (8, 2749940), (10, 2199952), (16, 1374970), (20, 1099976), (32, 687485), (40, 549988), (80, 274994), (160, 137497), (359, 61280), (383, 57440), (718, 30640), (766, 28720), (1436, 15320), (1532, 14360), (1795, 12256), (1915, 11488), (2872, 7660), (3064, 7180), (3590, 6128), (3830, 5744)]