21007308

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{313}}^1$

素因数の和:391

約数の個数: 96

約数和(自身を含む): 60770304

約数和(自身を除く): 39762996

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 17, 21, 28, 34, 42, 47, 51, 68, 84, 94, 102, 119, 141, 188, 204, 238, 282, 313, 329, 357, 476, 564, 626, 658, 714, 799, 939, 987, 1252, 1316, 1428, 1598, 1878, 1974, 2191, 2397, 3196, 3756, 3948, 4382, 4794, 5321, 5593, 6573, 8764, 9588, 10642, 11186, 13146, 14711, 15963, 16779, 21284, 22372, 26292, 29422, 31926, 33558, 37247, 44133, 58844, 63852, 67116, 74494, 88266, 102977, 111741, 148988, 176532, 205954, 223482, 250087, 308931, 411908, 446964, 500174, 617862, 750261, 1000348, 1235724, 1500522, 1750609, 3001044, 3501218, 5251827, 7002436, 10503654, 21007308]

約数ペア:

[(1, 21007308), (2, 10503654), (3, 7002436), (4, 5251827), (6, 3501218), (7, 3001044), (12, 1750609), (14, 1500522), (17, 1235724), (21, 1000348), (28, 750261), (34, 617862), (42, 500174), (47, 446964), (51, 411908), (68, 308931), (84, 250087), (94, 223482), (102, 205954), (119, 176532), (141, 148988), (188, 111741), (204, 102977), (238, 88266), (282, 74494), (313, 67116), (329, 63852), (357, 58844), (476, 44133), (564, 37247), (626, 33558), (658, 31926), (714, 29422), (799, 26292), (939, 22372), (987, 21284), (1252, 16779), (1316, 15963), (1428, 14711), (1598, 13146), (1878, 11186), (1974, 10642), (2191, 9588), (2397, 8764), (3196, 6573), (3756, 5593), (3948, 5321), (4382, 4794)]