30721775

素因数分解:

$5^2\times 7^2\times {\mathrm{31}}^1\times {\mathrm{809}}^1$

素因数の和:864

約数の個数: 36

約数和(自身を含む): 45800640

約数和(自身を除く): 15078865

約数列:

[1, 5, 7, 25, 31, 35, 49, 155, 175, 217, 245, 775, 809, 1085, 1225, 1519, 4045, 5425, 5663, 7595, 20225, 25079, 28315, 37975, 39641, 125395, 141575, 175553, 198205, 626975, 877765, 991025, 1228871, 4388825, 6144355, 30721775]

約数ペア:

[(1, 30721775), (5, 6144355), (7, 4388825), (25, 1228871), (31, 991025), (35, 877765), (49, 626975), (155, 198205), (175, 175553), (217, 141575), (245, 125395), (775, 39641), (809, 37975), (1085, 28315), (1225, 25079), (1519, 20225), (4045, 7595), (5425, 5663)]