20388459

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{227}}^1$

素因数の和:304

約数の個数: 48

約数和(自身を含む): 34933248

約数和(自身を除く): 14544789

約数列:

[1, 3, 7, 13, 21, 39, 47, 49, 91, 141, 147, 227, 273, 329, 611, 637, 681, 987, 1589, 1833, 1911, 2303, 2951, 4277, 4767, 6909, 8853, 10669, 11123, 12831, 20657, 29939, 32007, 33369, 61971, 74683, 89817, 138697, 144599, 224049, 416091, 433797, 522781, 970879, 1568343, 2912637, 6796153, 20388459]

約数ペア:

[(1, 20388459), (3, 6796153), (7, 2912637), (13, 1568343), (21, 970879), (39, 522781), (47, 433797), (49, 416091), (91, 224049), (141, 144599), (147, 138697), (227, 89817), (273, 74683), (329, 61971), (611, 33369), (637, 32007), (681, 29939), (987, 20657), (1589, 12831), (1833, 11123), (1911, 10669), (2303, 8853), (2951, 6909), (4277, 4767)]