20278510

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{193}}^1$

素因数の和:305

約数の個数: 64

約数和(自身を含む): 44697600

約数和(自身を除く): 24419090

約数列:

[1, 2, 5, 7, 10, 14, 19, 35, 38, 70, 79, 95, 133, 158, 190, 193, 266, 386, 395, 553, 665, 790, 965, 1106, 1330, 1351, 1501, 1930, 2702, 2765, 3002, 3667, 5530, 6755, 7334, 7505, 10507, 13510, 15010, 15247, 18335, 21014, 25669, 30494, 36670, 51338, 52535, 76235, 105070, 106729, 128345, 152470, 213458, 256690, 289693, 533645, 579386, 1067290, 1448465, 2027851, 2896930, 4055702, 10139255, 20278510]

約数ペア:

[(1, 20278510), (2, 10139255), (5, 4055702), (7, 2896930), (10, 2027851), (14, 1448465), (19, 1067290), (35, 579386), (38, 533645), (70, 289693), (79, 256690), (95, 213458), (133, 152470), (158, 128345), (190, 106729), (193, 105070), (266, 76235), (386, 52535), (395, 51338), (553, 36670), (665, 30494), (790, 25669), (965, 21014), (1106, 18335), (1330, 15247), (1351, 15010), (1501, 13510), (1930, 10507), (2702, 7505), (2765, 7334), (3002, 6755), (3667, 5530)]