20987190

素因数分解:

$2^1\times 3^2\times 5^1\times 7^2\times {\mathrm{4759}}^1$

素因数の和:4786

約数の個数: 72

約数和(自身を含む): 63488880

約数和(自身を除く): 42501690

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 14, 15, 18, 21, 30, 35, 42, 45, 49, 63, 70, 90, 98, 105, 126, 147, 210, 245, 294, 315, 441, 490, 630, 735, 882, 1470, 2205, 4410, 4759, 9518, 14277, 23795, 28554, 33313, 42831, 47590, 66626, 71385, 85662, 99939, 142770, 166565, 199878, 214155, 233191, 299817, 333130, 428310, 466382, 499695, 599634, 699573, 999390, 1165955, 1399146, 1499085, 2098719, 2331910, 2998170, 3497865, 4197438, 6995730, 10493595, 20987190]

約数ペア:

[(1, 20987190), (2, 10493595), (3, 6995730), (5, 4197438), (6, 3497865), (7, 2998170), (9, 2331910), (10, 2098719), (14, 1499085), (15, 1399146), (18, 1165955), (21, 999390), (30, 699573), (35, 599634), (42, 499695), (45, 466382), (49, 428310), (63, 333130), (70, 299817), (90, 233191), (98, 214155), (105, 199878), (126, 166565), (147, 142770), (210, 99939), (245, 85662), (294, 71385), (315, 66626), (441, 47590), (490, 42831), (630, 33313), (735, 28554), (882, 23795), (1470, 14277), (2205, 9518), (4410, 4759)]