21158060

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{1249}}^1$

素因数の和:1287

約数の個数: 72

約数和(自身を含む): 55860000

約数和(自身を除く): 34701940

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 121, 140, 154, 220, 242, 308, 385, 484, 605, 770, 847, 1210, 1249, 1540, 1694, 2420, 2498, 3388, 4235, 4996, 6245, 8470, 8743, 12490, 13739, 16940, 17486, 24980, 27478, 34972, 43715, 54956, 68695, 87430, 96173, 137390, 151129, 174860, 192346, 274780, 302258, 384692, 480865, 604516, 755645, 961730, 1057903, 1511290, 1923460, 2115806, 3022580, 4231612, 5289515, 10579030, 21158060]

約数ペア:

[(1, 21158060), (2, 10579030), (4, 5289515), (5, 4231612), (7, 3022580), (10, 2115806), (11, 1923460), (14, 1511290), (20, 1057903), (22, 961730), (28, 755645), (35, 604516), (44, 480865), (55, 384692), (70, 302258), (77, 274780), (110, 192346), (121, 174860), (140, 151129), (154, 137390), (220, 96173), (242, 87430), (308, 68695), (385, 54956), (484, 43715), (605, 34972), (770, 27478), (847, 24980), (1210, 17486), (1249, 16940), (1540, 13739), (1694, 12490), (2420, 8743), (2498, 8470), (3388, 6245), (4235, 4996)]