18909756

素因数分解:

$2^2\times 3^2\times {\mathrm{61}}^1\times {\mathrm{79}}^1\times {\mathrm{109}}^1$

素因数の和:259

約数の個数: 72

約数和(自身を含む): 49649600

約数和(自身を除く): 30739844

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 61, 79, 109, 122, 158, 183, 218, 237, 244, 316, 327, 366, 436, 474, 549, 654, 711, 732, 948, 981, 1098, 1308, 1422, 1962, 2196, 2844, 3924, 4819, 6649, 8611, 9638, 13298, 14457, 17222, 19276, 19947, 25833, 26596, 28914, 34444, 39894, 43371, 51666, 57828, 59841, 77499, 79788, 86742, 103332, 119682, 154998, 173484, 239364, 309996, 525271, 1050542, 1575813, 2101084, 3151626, 4727439, 6303252, 9454878, 18909756]

約数ペア:

[(1, 18909756), (2, 9454878), (3, 6303252), (4, 4727439), (6, 3151626), (9, 2101084), (12, 1575813), (18, 1050542), (36, 525271), (61, 309996), (79, 239364), (109, 173484), (122, 154998), (158, 119682), (183, 103332), (218, 86742), (237, 79788), (244, 77499), (316, 59841), (327, 57828), (366, 51666), (436, 43371), (474, 39894), (549, 34444), (654, 28914), (711, 26596), (732, 25833), (948, 19947), (981, 19276), (1098, 17222), (1308, 14457), (1422, 13298), (1962, 9638), (2196, 8611), (2844, 6649), (3924, 4819)]