18687460

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{173}}^1\times {\mathrm{491}}^1$

素因数の和:684

約数の個数: 48

約数和(自身を含む): 43146432

約数和(自身を除く): 24458972

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 173, 220, 346, 491, 692, 865, 982, 1730, 1903, 1964, 2455, 3460, 3806, 4910, 5401, 7612, 9515, 9820, 10802, 19030, 21604, 27005, 38060, 54010, 84943, 108020, 169886, 339772, 424715, 849430, 934373, 1698860, 1868746, 3737492, 4671865, 9343730, 18687460]

約数ペア:

[(1, 18687460), (2, 9343730), (4, 4671865), (5, 3737492), (10, 1868746), (11, 1698860), (20, 934373), (22, 849430), (44, 424715), (55, 339772), (110, 169886), (173, 108020), (220, 84943), (346, 54010), (491, 38060), (692, 27005), (865, 21604), (982, 19030), (1730, 10802), (1903, 9820), (1964, 9515), (2455, 7612), (3460, 5401), (3806, 4910)]