19811790

素因数分解:

$2^1\times 3^5\times 5^1\times {\mathrm{31}}^1\times {\mathrm{263}}^1$

素因数の和:316

約数の個数: 96

約数和(自身を含む): 55351296

約数和(自身を除く): 35539506

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 31, 45, 54, 62, 81, 90, 93, 135, 155, 162, 186, 243, 263, 270, 279, 310, 405, 465, 486, 526, 558, 789, 810, 837, 930, 1215, 1315, 1395, 1578, 1674, 2367, 2430, 2511, 2630, 2790, 3945, 4185, 4734, 5022, 7101, 7533, 7890, 8153, 8370, 11835, 12555, 14202, 15066, 16306, 21303, 23670, 24459, 25110, 35505, 37665, 40765, 42606, 48918, 63909, 71010, 73377, 75330, 81530, 106515, 122295, 127818, 146754, 213030, 220131, 244590, 319545, 366885, 440262, 639090, 660393, 733770, 1100655, 1320786, 1981179, 2201310, 3301965, 3962358, 6603930, 9905895, 19811790]

約数ペア:

[(1, 19811790), (2, 9905895), (3, 6603930), (5, 3962358), (6, 3301965), (9, 2201310), (10, 1981179), (15, 1320786), (18, 1100655), (27, 733770), (30, 660393), (31, 639090), (45, 440262), (54, 366885), (62, 319545), (81, 244590), (90, 220131), (93, 213030), (135, 146754), (155, 127818), (162, 122295), (186, 106515), (243, 81530), (263, 75330), (270, 73377), (279, 71010), (310, 63909), (405, 48918), (465, 42606), (486, 40765), (526, 37665), (558, 35505), (789, 25110), (810, 24459), (837, 23670), (930, 21303), (1215, 16306), (1315, 15066), (1395, 14202), (1578, 12555), (1674, 11835), (2367, 8370), (2430, 8153), (2511, 7890), (2630, 7533), (2790, 7101), (3945, 5022), (4185, 4734)]