728140

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{743}}^1$

素因数の和:766

約数の個数: 36

約数和(自身を含む): 1781136

約数和(自身を除く): 1052996

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 743, 980, 1486, 2972, 3715, 5201, 7430, 10402, 14860, 20804, 26005, 36407, 52010, 72814, 104020, 145628, 182035, 364070, 728140]

約数ペア:

[(1, 728140), (2, 364070), (4, 182035), (5, 145628), (7, 104020), (10, 72814), (14, 52010), (20, 36407), (28, 26005), (35, 20804), (49, 14860), (70, 10402), (98, 7430), (140, 5201), (196, 3715), (245, 2972), (490, 1486), (743, 980)]