21840700

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{761}}^1$

素因数の和:823

約数の個数: 72

約数和(自身を含む): 55558944

約数和(自身を除く): 33718244

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 41, 50, 70, 82, 100, 140, 164, 175, 205, 287, 350, 410, 574, 700, 761, 820, 1025, 1148, 1435, 1522, 2050, 2870, 3044, 3805, 4100, 5327, 5740, 7175, 7610, 10654, 14350, 15220, 19025, 21308, 26635, 28700, 31201, 38050, 53270, 62402, 76100, 106540, 124804, 133175, 156005, 218407, 266350, 312010, 436814, 532700, 624020, 780025, 873628, 1092035, 1560050, 2184070, 3120100, 4368140, 5460175, 10920350, 21840700]

約数ペア:

[(1, 21840700), (2, 10920350), (4, 5460175), (5, 4368140), (7, 3120100), (10, 2184070), (14, 1560050), (20, 1092035), (25, 873628), (28, 780025), (35, 624020), (41, 532700), (50, 436814), (70, 312010), (82, 266350), (100, 218407), (140, 156005), (164, 133175), (175, 124804), (205, 106540), (287, 76100), (350, 62402), (410, 53270), (574, 38050), (700, 31201), (761, 28700), (820, 26635), (1025, 21308), (1148, 19025), (1435, 15220), (1522, 14350), (2050, 10654), (2870, 7610), (3044, 7175), (3805, 5740), (4100, 5327)]