21148540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{5209}}^1$

素因数の和:5254

約数の個数: 48

約数和(自身を含む): 52516800

約数和(自身を除く): 31368260

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 58, 70, 116, 140, 145, 203, 290, 406, 580, 812, 1015, 2030, 4060, 5209, 10418, 20836, 26045, 36463, 52090, 72926, 104180, 145852, 151061, 182315, 302122, 364630, 604244, 729260, 755305, 1057427, 1510610, 2114854, 3021220, 4229708, 5287135, 10574270, 21148540]

約数ペア:

[(1, 21148540), (2, 10574270), (4, 5287135), (5, 4229708), (7, 3021220), (10, 2114854), (14, 1510610), (20, 1057427), (28, 755305), (29, 729260), (35, 604244), (58, 364630), (70, 302122), (116, 182315), (140, 151061), (145, 145852), (203, 104180), (290, 72926), (406, 52090), (580, 36463), (812, 26045), (1015, 20836), (2030, 10418), (4060, 5209)]