19900635

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{1559}}^1$

素因数の和:1627

約数の個数: 32

約数和(自身を含む): 34145280

約数和(自身を除く): 14244645

約数列:

[1, 3, 5, 15, 23, 37, 69, 111, 115, 185, 345, 555, 851, 1559, 2553, 4255, 4677, 7795, 12765, 23385, 35857, 57683, 107571, 173049, 179285, 288415, 537855, 865245, 1326709, 3980127, 6633545, 19900635]

約数ペア:

[(1, 19900635), (3, 6633545), (5, 3980127), (15, 1326709), (23, 865245), (37, 537855), (69, 288415), (111, 179285), (115, 173049), (185, 107571), (345, 57683), (555, 35857), (851, 23385), (1559, 12765), (2553, 7795), (4255, 4677)]