21016940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{107}}^1$

素因数の和:207

約数の個数: 96

約数和(自身を含む): 53996544

約数和(自身を除く): 32979604

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 61, 70, 92, 107, 115, 122, 140, 161, 214, 230, 244, 305, 322, 427, 428, 460, 535, 610, 644, 749, 805, 854, 1070, 1220, 1403, 1498, 1610, 1708, 2135, 2140, 2461, 2806, 2996, 3220, 3745, 4270, 4922, 5612, 6527, 7015, 7490, 8540, 9821, 9844, 12305, 13054, 14030, 14980, 17227, 19642, 24610, 26108, 28060, 32635, 34454, 39284, 45689, 49105, 49220, 65270, 68908, 86135, 91378, 98210, 130540, 150121, 172270, 182756, 196420, 228445, 300242, 344540, 456890, 600484, 750605, 913780, 1050847, 1501210, 2101694, 3002420, 4203388, 5254235, 10508470, 21016940]

約数ペア:

[(1, 21016940), (2, 10508470), (4, 5254235), (5, 4203388), (7, 3002420), (10, 2101694), (14, 1501210), (20, 1050847), (23, 913780), (28, 750605), (35, 600484), (46, 456890), (61, 344540), (70, 300242), (92, 228445), (107, 196420), (115, 182756), (122, 172270), (140, 150121), (161, 130540), (214, 98210), (230, 91378), (244, 86135), (305, 68908), (322, 65270), (427, 49220), (428, 49105), (460, 45689), (535, 39284), (610, 34454), (644, 32635), (749, 28060), (805, 26108), (854, 24610), (1070, 19642), (1220, 17227), (1403, 14980), (1498, 14030), (1610, 13054), (1708, 12305), (2135, 9844), (2140, 9821), (2461, 8540), (2806, 7490), (2996, 7015), (3220, 6527), (3745, 5612), (4270, 4922)]