18620225

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1$

素因数の和:146

約数の個数: 48

約数和(自身を含む): 26998272

約数和(自身を除く): 8378047

約数列:

[1, 5, 13, 23, 25, 47, 53, 65, 115, 235, 265, 299, 325, 575, 611, 689, 1081, 1175, 1219, 1325, 1495, 2491, 3055, 3445, 5405, 6095, 7475, 12455, 14053, 15275, 15847, 17225, 27025, 30475, 32383, 57293, 62275, 70265, 79235, 161915, 286465, 351325, 396175, 744809, 809575, 1432325, 3724045, 18620225]

約数ペア:

[(1, 18620225), (5, 3724045), (13, 1432325), (23, 809575), (25, 744809), (47, 396175), (53, 351325), (65, 286465), (115, 161915), (235, 79235), (265, 70265), (299, 62275), (325, 57293), (575, 32383), (611, 30475), (689, 27025), (1081, 17225), (1175, 15847), (1219, 15275), (1325, 14053), (1495, 12455), (2491, 7475), (3055, 6095), (3445, 5405)]