20448725

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{61}}^1$

素因数の和:158

約数の個数: 48

約数和(自身を含む): 29890944

約数和(自身を除く): 9442219

約数列:

[1, 5, 11, 23, 25, 53, 55, 61, 115, 253, 265, 275, 305, 575, 583, 671, 1219, 1265, 1325, 1403, 1525, 2915, 3233, 3355, 6095, 6325, 7015, 13409, 14575, 15433, 16165, 16775, 30475, 35075, 35563, 67045, 74359, 77165, 80825, 177815, 335225, 371795, 385825, 817949, 889075, 1858975, 4089745, 20448725]

約数ペア:

[(1, 20448725), (5, 4089745), (11, 1858975), (23, 889075), (25, 817949), (53, 385825), (55, 371795), (61, 335225), (115, 177815), (253, 80825), (265, 77165), (275, 74359), (305, 67045), (575, 35563), (583, 35075), (671, 30475), (1219, 16775), (1265, 16165), (1325, 15433), (1403, 14575), (1525, 13409), (2915, 7015), (3233, 6325), (3355, 6095)]