21612015

素因数分解:

$3^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1$

素因数の和:150

約数の個数: 80

約数和(自身を含む): 42549408

約数和(自身を除く): 20937393

約数列:

[1, 3, 5, 9, 15, 17, 27, 43, 45, 51, 73, 81, 85, 129, 135, 153, 215, 219, 255, 365, 387, 405, 459, 645, 657, 731, 765, 1095, 1161, 1241, 1377, 1935, 1971, 2193, 2295, 3139, 3285, 3483, 3655, 3723, 5805, 5913, 6205, 6579, 6885, 9417, 9855, 10965, 11169, 15695, 17415, 18615, 19737, 28251, 29565, 32895, 33507, 47085, 53363, 55845, 59211, 84753, 98685, 100521, 141255, 160089, 167535, 254259, 266815, 296055, 423765, 480267, 502605, 800445, 1271295, 1440801, 2401335, 4322403, 7204005, 21612015]

約数ペア:

[(1, 21612015), (3, 7204005), (5, 4322403), (9, 2401335), (15, 1440801), (17, 1271295), (27, 800445), (43, 502605), (45, 480267), (51, 423765), (73, 296055), (81, 266815), (85, 254259), (129, 167535), (135, 160089), (153, 141255), (215, 100521), (219, 98685), (255, 84753), (365, 59211), (387, 55845), (405, 53363), (459, 47085), (645, 33507), (657, 32895), (731, 29565), (765, 28251), (1095, 19737), (1161, 18615), (1241, 17415), (1377, 15695), (1935, 11169), (1971, 10965), (2193, 9855), (2295, 9417), (3139, 6885), (3285, 6579), (3483, 6205), (3655, 5913), (3723, 5805)]