21105756

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{1373}}^1$

素因数の和:1451

約数の個数: 72

約数和(自身を含む): 62016864

約数和(自身を除く): 40911108

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 61, 63, 84, 122, 126, 183, 244, 252, 366, 427, 549, 732, 854, 1098, 1281, 1373, 1708, 2196, 2562, 2746, 3843, 4119, 5124, 5492, 7686, 8238, 9611, 12357, 15372, 16476, 19222, 24714, 28833, 38444, 49428, 57666, 83753, 86499, 115332, 167506, 172998, 251259, 335012, 345996, 502518, 586271, 753777, 1005036, 1172542, 1507554, 1758813, 2345084, 3015108, 3517626, 5276439, 7035252, 10552878, 21105756]

約数ペア:

[(1, 21105756), (2, 10552878), (3, 7035252), (4, 5276439), (6, 3517626), (7, 3015108), (9, 2345084), (12, 1758813), (14, 1507554), (18, 1172542), (21, 1005036), (28, 753777), (36, 586271), (42, 502518), (61, 345996), (63, 335012), (84, 251259), (122, 172998), (126, 167506), (183, 115332), (244, 86499), (252, 83753), (366, 57666), (427, 49428), (549, 38444), (732, 28833), (854, 24714), (1098, 19222), (1281, 16476), (1373, 15372), (1708, 12357), (2196, 9611), (2562, 8238), (2746, 7686), (3843, 5492), (4119, 5124)]