81846540

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{3319}}^1$

素因数の和:3471

約数の個数: 72

約数和(自身を含む): 250155360

約数和(自身を除く): 168308820

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 137, 180, 274, 411, 548, 685, 822, 1233, 1370, 1644, 2055, 2466, 2740, 3319, 4110, 4932, 6165, 6638, 8220, 9957, 12330, 13276, 16595, 19914, 24660, 29871, 33190, 39828, 49785, 59742, 66380, 99570, 119484, 149355, 199140, 298710, 454703, 597420, 909406, 1364109, 1818812, 2273515, 2728218, 4092327, 4547030, 5456436, 6820545, 8184654, 9094060, 13641090, 16369308, 20461635, 27282180, 40923270, 81846540]

約数ペア:

[(1, 81846540), (2, 40923270), (3, 27282180), (4, 20461635), (5, 16369308), (6, 13641090), (9, 9094060), (10, 8184654), (12, 6820545), (15, 5456436), (18, 4547030), (20, 4092327), (30, 2728218), (36, 2273515), (45, 1818812), (60, 1364109), (90, 909406), (137, 597420), (180, 454703), (274, 298710), (411, 199140), (548, 149355), (685, 119484), (822, 99570), (1233, 66380), (1370, 59742), (1644, 49785), (2055, 39828), (2466, 33190), (2740, 29871), (3319, 24660), (4110, 19914), (4932, 16595), (6165, 13276), (6638, 12330), (8220, 9957)]