80438020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{857}}^1$

素因数の和:917

約数の個数: 72

約数和(自身を含む): 192216024

約数和(自身を除く): 111778004

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 130, 190, 247, 260, 361, 380, 494, 722, 857, 988, 1235, 1444, 1714, 1805, 2470, 3428, 3610, 4285, 4693, 4940, 7220, 8570, 9386, 11141, 16283, 17140, 18772, 22282, 23465, 32566, 44564, 46930, 55705, 65132, 81415, 93860, 111410, 162830, 211679, 222820, 309377, 325660, 423358, 618754, 846716, 1058395, 1237508, 1546885, 2116790, 3093770, 4021901, 4233580, 6187540, 8043802, 16087604, 20109505, 40219010, 80438020]

約数ペア:

[(1, 80438020), (2, 40219010), (4, 20109505), (5, 16087604), (10, 8043802), (13, 6187540), (19, 4233580), (20, 4021901), (26, 3093770), (38, 2116790), (52, 1546885), (65, 1237508), (76, 1058395), (95, 846716), (130, 618754), (190, 423358), (247, 325660), (260, 309377), (361, 222820), (380, 211679), (494, 162830), (722, 111410), (857, 93860), (988, 81415), (1235, 65132), (1444, 55705), (1714, 46930), (1805, 44564), (2470, 32566), (3428, 23465), (3610, 22282), (4285, 18772), (4693, 17140), (4940, 16283), (7220, 11141), (8570, 9386)]