28720780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{6871}}^1$

素因数の和:6910

約数の個数: 48

約数和(自身を含む): 69269760

約数和(自身を除く): 40548980

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 76, 95, 110, 190, 209, 220, 380, 418, 836, 1045, 2090, 4180, 6871, 13742, 27484, 34355, 68710, 75581, 130549, 137420, 151162, 261098, 302324, 377905, 522196, 652745, 755810, 1305490, 1436039, 1511620, 2610980, 2872078, 5744156, 7180195, 14360390, 28720780]

約数ペア:

[(1, 28720780), (2, 14360390), (4, 7180195), (5, 5744156), (10, 2872078), (11, 2610980), (19, 1511620), (20, 1436039), (22, 1305490), (38, 755810), (44, 652745), (55, 522196), (76, 377905), (95, 302324), (110, 261098), (190, 151162), (209, 137420), (220, 130549), (380, 75581), (418, 68710), (836, 34355), (1045, 27484), (2090, 13742), (4180, 6871)]