20871774

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{37}}^2$

素因数の和:111

約数の個数: 108

約数和(自身を含む): 58384872

約数和(自身を除く): 37513098

約数列:

[1, 2, 3, 6, 7, 9, 11, 14, 18, 21, 22, 33, 37, 42, 63, 66, 74, 77, 99, 111, 121, 126, 154, 198, 222, 231, 242, 259, 333, 363, 407, 462, 518, 666, 693, 726, 777, 814, 847, 1089, 1221, 1369, 1386, 1554, 1694, 2178, 2331, 2442, 2541, 2738, 2849, 3663, 4107, 4477, 4662, 5082, 5698, 7326, 7623, 8214, 8547, 8954, 9583, 12321, 13431, 15059, 15246, 17094, 19166, 24642, 25641, 26862, 28749, 30118, 31339, 40293, 45177, 51282, 57498, 62678, 80586, 86247, 90354, 94017, 105413, 135531, 165649, 172494, 188034, 210826, 271062, 282051, 316239, 331298, 496947, 564102, 632478, 948717, 993894, 1159543, 1490841, 1897434, 2319086, 2981682, 3478629, 6957258, 10435887, 20871774]

約数ペア:

[(1, 20871774), (2, 10435887), (3, 6957258), (6, 3478629), (7, 2981682), (9, 2319086), (11, 1897434), (14, 1490841), (18, 1159543), (21, 993894), (22, 948717), (33, 632478), (37, 564102), (42, 496947), (63, 331298), (66, 316239), (74, 282051), (77, 271062), (99, 210826), (111, 188034), (121, 172494), (126, 165649), (154, 135531), (198, 105413), (222, 94017), (231, 90354), (242, 86247), (259, 80586), (333, 62678), (363, 57498), (407, 51282), (462, 45177), (518, 40293), (666, 31339), (693, 30118), (726, 28749), (777, 26862), (814, 25641), (847, 24642), (1089, 19166), (1221, 17094), (1369, 15246), (1386, 15059), (1554, 13431), (1694, 12321), (2178, 9583), (2331, 8954), (2442, 8547), (2541, 8214), (2738, 7623), (2849, 7326), (3663, 5698), (4107, 5082), (4477, 4662)]