21705138

素因数分解:

$2^1\times 3^3\times 7^2\times {\mathrm{13}}^1\times {\mathrm{631}}^1$

素因数の和:669

約数の個数: 96

約数和(自身を含む): 60520320

約数和(自身を除く): 38815182

約数列:

[1, 2, 3, 6, 7, 9, 13, 14, 18, 21, 26, 27, 39, 42, 49, 54, 63, 78, 91, 98, 117, 126, 147, 182, 189, 234, 273, 294, 351, 378, 441, 546, 631, 637, 702, 819, 882, 1262, 1274, 1323, 1638, 1893, 1911, 2457, 2646, 3786, 3822, 4417, 4914, 5679, 5733, 8203, 8834, 11358, 11466, 13251, 16406, 17037, 17199, 24609, 26502, 30919, 34074, 34398, 39753, 49218, 57421, 61838, 73827, 79506, 92757, 114842, 119259, 147654, 172263, 185514, 221481, 238518, 278271, 344526, 401947, 442962, 516789, 556542, 803894, 834813, 1033578, 1205841, 1550367, 1669626, 2411682, 3100734, 3617523, 7235046, 10852569, 21705138]

約数ペア:

[(1, 21705138), (2, 10852569), (3, 7235046), (6, 3617523), (7, 3100734), (9, 2411682), (13, 1669626), (14, 1550367), (18, 1205841), (21, 1033578), (26, 834813), (27, 803894), (39, 556542), (42, 516789), (49, 442962), (54, 401947), (63, 344526), (78, 278271), (91, 238518), (98, 221481), (117, 185514), (126, 172263), (147, 147654), (182, 119259), (189, 114842), (234, 92757), (273, 79506), (294, 73827), (351, 61838), (378, 57421), (441, 49218), (546, 39753), (631, 34398), (637, 34074), (702, 30919), (819, 26502), (882, 24609), (1262, 17199), (1274, 17037), (1323, 16406), (1638, 13251), (1893, 11466), (1911, 11358), (2457, 8834), (2646, 8203), (3786, 5733), (3822, 5679), (4417, 4914)]