78661940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{61}}^2\times {\mathrm{151}}^1$

素因数の和:289

約数の個数: 72

約数和(自身を含む): 193205376

約数和(自身を除く): 114543436

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 61, 70, 122, 140, 151, 244, 302, 305, 427, 604, 610, 755, 854, 1057, 1220, 1510, 1708, 2114, 2135, 3020, 3721, 4228, 4270, 5285, 7442, 8540, 9211, 10570, 14884, 18422, 18605, 21140, 26047, 36844, 37210, 46055, 52094, 64477, 74420, 92110, 104188, 128954, 130235, 184220, 257908, 260470, 322385, 520940, 561871, 644770, 1123742, 1289540, 2247484, 2809355, 3933097, 5618710, 7866194, 11237420, 15732388, 19665485, 39330970, 78661940]

約数ペア:

[(1, 78661940), (2, 39330970), (4, 19665485), (5, 15732388), (7, 11237420), (10, 7866194), (14, 5618710), (20, 3933097), (28, 2809355), (35, 2247484), (61, 1289540), (70, 1123742), (122, 644770), (140, 561871), (151, 520940), (244, 322385), (302, 260470), (305, 257908), (427, 184220), (604, 130235), (610, 128954), (755, 104188), (854, 92110), (1057, 74420), (1220, 64477), (1510, 52094), (1708, 46055), (2114, 37210), (2135, 36844), (3020, 26047), (3721, 21140), (4228, 18605), (4270, 18422), (5285, 14884), (7442, 10570), (8540, 9211)]