20997585

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{191}}^1\times {\mathrm{349}}^1$

素因数の和:558

約数の個数: 48

約数和(自身を含む): 41932800

約数和(自身を除く): 20935215

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 191, 315, 349, 573, 955, 1047, 1337, 1719, 1745, 2443, 2865, 3141, 4011, 5235, 6685, 7329, 8595, 12033, 12215, 15705, 20055, 21987, 36645, 60165, 66659, 109935, 199977, 333295, 466613, 599931, 999885, 1399839, 2333065, 2999655, 4199517, 6999195, 20997585]

約数ペア:

[(1, 20997585), (3, 6999195), (5, 4199517), (7, 2999655), (9, 2333065), (15, 1399839), (21, 999885), (35, 599931), (45, 466613), (63, 333295), (105, 199977), (191, 109935), (315, 66659), (349, 60165), (573, 36645), (955, 21987), (1047, 20055), (1337, 15705), (1719, 12215), (1745, 12033), (2443, 8595), (2865, 7329), (3141, 6685), (4011, 5235)]