19778275

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{59}}^1$

素因数の和:156

約数の個数: 48

約数和(自身を含む): 28926720

約数和(自身を除く): 9148445

約数列:

[1, 5, 11, 23, 25, 53, 55, 59, 115, 253, 265, 275, 295, 575, 583, 649, 1219, 1265, 1325, 1357, 1475, 2915, 3127, 3245, 6095, 6325, 6785, 13409, 14575, 14927, 15635, 16225, 30475, 33925, 34397, 67045, 71921, 74635, 78175, 171985, 335225, 359605, 373175, 791131, 859925, 1798025, 3955655, 19778275]

約数ペア:

[(1, 19778275), (5, 3955655), (11, 1798025), (23, 859925), (25, 791131), (53, 373175), (55, 359605), (59, 335225), (115, 171985), (253, 78175), (265, 74635), (275, 71921), (295, 67045), (575, 34397), (583, 33925), (649, 30475), (1219, 16225), (1265, 15635), (1325, 14927), (1357, 14575), (1475, 13409), (2915, 6785), (3127, 6325), (3245, 6095)]