20164880

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{173}}^1$

素因数の和:264

約数の個数: 80

約数和(自身を含む): 49711104

約数和(自身を除く): 29546224

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 47, 62, 80, 94, 124, 155, 173, 188, 235, 248, 310, 346, 376, 470, 496, 620, 692, 752, 865, 940, 1240, 1384, 1457, 1730, 1880, 2480, 2768, 2914, 3460, 3760, 5363, 5828, 6920, 7285, 8131, 10726, 11656, 13840, 14570, 16262, 21452, 23312, 26815, 29140, 32524, 40655, 42904, 53630, 58280, 65048, 81310, 85808, 107260, 116560, 130096, 162620, 214520, 252061, 325240, 429040, 504122, 650480, 1008244, 1260305, 2016488, 2520610, 4032976, 5041220, 10082440, 20164880]

約数ペア:

[(1, 20164880), (2, 10082440), (4, 5041220), (5, 4032976), (8, 2520610), (10, 2016488), (16, 1260305), (20, 1008244), (31, 650480), (40, 504122), (47, 429040), (62, 325240), (80, 252061), (94, 214520), (124, 162620), (155, 130096), (173, 116560), (188, 107260), (235, 85808), (248, 81310), (310, 65048), (346, 58280), (376, 53630), (470, 42904), (496, 40655), (620, 32524), (692, 29140), (752, 26815), (865, 23312), (940, 21452), (1240, 16262), (1384, 14570), (1457, 13840), (1730, 11656), (1880, 10726), (2480, 8131), (2768, 7285), (2914, 6920), (3460, 5828), (3760, 5363)]