21180180

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{211}}^1\times {\mathrm{239}}^1$

素因数の和:469

約数の個数: 96

約数和(自身を含む): 68382720

約数和(自身を除く): 47202540

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 211, 239, 420, 422, 478, 633, 717, 844, 956, 1055, 1195, 1266, 1434, 1477, 1673, 2110, 2390, 2532, 2868, 2954, 3165, 3346, 3585, 4220, 4431, 4780, 5019, 5908, 6330, 6692, 7170, 7385, 8365, 8862, 10038, 12660, 14340, 14770, 16730, 17724, 20076, 22155, 25095, 29540, 33460, 44310, 50190, 50429, 88620, 100380, 100858, 151287, 201716, 252145, 302574, 353003, 504290, 605148, 706006, 756435, 1008580, 1059009, 1412012, 1512870, 1765015, 2118018, 3025740, 3530030, 4236036, 5295045, 7060060, 10590090, 21180180]

約数ペア:

[(1, 21180180), (2, 10590090), (3, 7060060), (4, 5295045), (5, 4236036), (6, 3530030), (7, 3025740), (10, 2118018), (12, 1765015), (14, 1512870), (15, 1412012), (20, 1059009), (21, 1008580), (28, 756435), (30, 706006), (35, 605148), (42, 504290), (60, 353003), (70, 302574), (84, 252145), (105, 201716), (140, 151287), (210, 100858), (211, 100380), (239, 88620), (420, 50429), (422, 50190), (478, 44310), (633, 33460), (717, 29540), (844, 25095), (956, 22155), (1055, 20076), (1195, 17724), (1266, 16730), (1434, 14770), (1477, 14340), (1673, 12660), (2110, 10038), (2390, 8862), (2532, 8365), (2868, 7385), (2954, 7170), (3165, 6692), (3346, 6330), (3585, 5908), (4220, 5019), (4431, 4780)]