20723240

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{73}}^1\times {\mathrm{151}}^1$

素因数の和:282

約数の個数: 64

約数和(自身を含む): 48591360

約数和(自身を除く): 27868120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 73, 94, 146, 151, 188, 235, 292, 302, 365, 376, 470, 584, 604, 730, 755, 940, 1208, 1460, 1510, 1880, 2920, 3020, 3431, 6040, 6862, 7097, 11023, 13724, 14194, 17155, 22046, 27448, 28388, 34310, 35485, 44092, 55115, 56776, 68620, 70970, 88184, 110230, 137240, 141940, 220460, 283880, 440920, 518081, 1036162, 2072324, 2590405, 4144648, 5180810, 10361620, 20723240]

約数ペア:

[(1, 20723240), (2, 10361620), (4, 5180810), (5, 4144648), (8, 2590405), (10, 2072324), (20, 1036162), (40, 518081), (47, 440920), (73, 283880), (94, 220460), (146, 141940), (151, 137240), (188, 110230), (235, 88184), (292, 70970), (302, 68620), (365, 56776), (376, 55115), (470, 44092), (584, 35485), (604, 34310), (730, 28388), (755, 27448), (940, 22046), (1208, 17155), (1460, 14194), (1510, 13724), (1880, 11023), (2920, 7097), (3020, 6862), (3431, 6040)]