19991205

素因数分解:

$3^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{3797}}^1$

素因数の和:3827

約数の個数: 40

約数和(自身を含む): 38602872

約数和(自身を除く): 18611667

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 45, 65, 81, 117, 135, 195, 351, 405, 585, 1053, 1755, 3797, 5265, 11391, 18985, 34173, 49361, 56955, 102519, 148083, 170865, 246805, 307557, 444249, 512595, 740415, 1332747, 1537785, 2221245, 3998241, 6663735, 19991205]

約数ペア:

[(1, 19991205), (3, 6663735), (5, 3998241), (9, 2221245), (13, 1537785), (15, 1332747), (27, 740415), (39, 512595), (45, 444249), (65, 307557), (81, 246805), (117, 170865), (135, 148083), (195, 102519), (351, 56955), (405, 49361), (585, 34173), (1053, 18985), (1755, 11391), (3797, 5265)]