1221780

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{2909}}^1$

素因数の和:2928

約数の個数: 48

約数和(自身を含む): 3911040

約数和(自身を除く): 2689260

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 2909, 5818, 8727, 11636, 14545, 17454, 20363, 29090, 34908, 40726, 43635, 58180, 61089, 81452, 87270, 101815, 122178, 174540, 203630, 244356, 305445, 407260, 610890, 1221780]

約数ペア:

[(1, 1221780), (2, 610890), (3, 407260), (4, 305445), (5, 244356), (6, 203630), (7, 174540), (10, 122178), (12, 101815), (14, 87270), (15, 81452), (20, 61089), (21, 58180), (28, 43635), (30, 40726), (35, 34908), (42, 29090), (60, 20363), (70, 17454), (84, 14545), (105, 11636), (140, 8727), (210, 5818), (420, 2909)]