81218970

素因数分解:

$2^1\times 3^3\times 5^1\times 7^3\times {\mathrm{877}}^1$

素因数の和:914

約数の個数: 128

約数和(自身を含む): 252864000

約数和(自身を除く): 171645030

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 14, 15, 18, 21, 27, 30, 35, 42, 45, 49, 54, 63, 70, 90, 98, 105, 126, 135, 147, 189, 210, 245, 270, 294, 315, 343, 378, 441, 490, 630, 686, 735, 877, 882, 945, 1029, 1323, 1470, 1715, 1754, 1890, 2058, 2205, 2631, 2646, 3087, 3430, 4385, 4410, 5145, 5262, 6139, 6174, 6615, 7893, 8770, 9261, 10290, 12278, 13155, 13230, 15435, 15786, 18417, 18522, 23679, 26310, 30695, 30870, 36834, 39465, 42973, 46305, 47358, 55251, 61390, 78930, 85946, 92085, 92610, 110502, 118395, 128919, 165753, 184170, 214865, 236790, 257838, 276255, 300811, 331506, 386757, 429730, 552510, 601622, 644595, 773514, 828765, 902433, 1160271, 1289190, 1504055, 1657530, 1804866, 1933785, 2320542, 2707299, 3008110, 3867570, 4512165, 5414598, 5801355, 8121897, 9024330, 11602710, 13536495, 16243794, 27072990, 40609485, 81218970]

約数ペア:

[(1, 81218970), (2, 40609485), (3, 27072990), (5, 16243794), (6, 13536495), (7, 11602710), (9, 9024330), (10, 8121897), (14, 5801355), (15, 5414598), (18, 4512165), (21, 3867570), (27, 3008110), (30, 2707299), (35, 2320542), (42, 1933785), (45, 1804866), (49, 1657530), (54, 1504055), (63, 1289190), (70, 1160271), (90, 902433), (98, 828765), (105, 773514), (126, 644595), (135, 601622), (147, 552510), (189, 429730), (210, 386757), (245, 331506), (270, 300811), (294, 276255), (315, 257838), (343, 236790), (378, 214865), (441, 184170), (490, 165753), (630, 128919), (686, 118395), (735, 110502), (877, 92610), (882, 92085), (945, 85946), (1029, 78930), (1323, 61390), (1470, 55251), (1715, 47358), (1754, 46305), (1890, 42973), (2058, 39465), (2205, 36834), (2631, 30870), (2646, 30695), (3087, 26310), (3430, 23679), (4385, 18522), (4410, 18417), (5145, 15786), (5262, 15435), (6139, 13230), (6174, 13155), (6615, 12278), (7893, 10290), (8770, 9261)]