19911920

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{31}}^2\times {\mathrm{37}}^1$

素因数の和:119

約数の個数: 120

約数和(自身を含む): 56148192

約数和(自身を除く): 36236272

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 31, 35, 37, 40, 56, 62, 70, 74, 80, 112, 124, 140, 148, 155, 185, 217, 248, 259, 280, 296, 310, 370, 434, 496, 518, 560, 592, 620, 740, 868, 961, 1036, 1085, 1147, 1240, 1295, 1480, 1736, 1922, 2072, 2170, 2294, 2480, 2590, 2960, 3472, 3844, 4144, 4340, 4588, 4805, 5180, 5735, 6727, 7688, 8029, 8680, 9176, 9610, 10360, 11470, 13454, 15376, 16058, 17360, 18352, 19220, 20720, 22940, 26908, 32116, 33635, 35557, 38440, 40145, 45880, 53816, 64232, 67270, 71114, 76880, 80290, 91760, 107632, 128464, 134540, 142228, 160580, 177785, 248899, 269080, 284456, 321160, 355570, 497798, 538160, 568912, 642320, 711140, 995596, 1244495, 1422280, 1991192, 2488990, 2844560, 3982384, 4977980, 9955960, 19911920]

約数ペア:

[(1, 19911920), (2, 9955960), (4, 4977980), (5, 3982384), (7, 2844560), (8, 2488990), (10, 1991192), (14, 1422280), (16, 1244495), (20, 995596), (28, 711140), (31, 642320), (35, 568912), (37, 538160), (40, 497798), (56, 355570), (62, 321160), (70, 284456), (74, 269080), (80, 248899), (112, 177785), (124, 160580), (140, 142228), (148, 134540), (155, 128464), (185, 107632), (217, 91760), (248, 80290), (259, 76880), (280, 71114), (296, 67270), (310, 64232), (370, 53816), (434, 45880), (496, 40145), (518, 38440), (560, 35557), (592, 33635), (620, 32116), (740, 26908), (868, 22940), (961, 20720), (1036, 19220), (1085, 18352), (1147, 17360), (1240, 16058), (1295, 15376), (1480, 13454), (1736, 11470), (1922, 10360), (2072, 9610), (2170, 9176), (2294, 8680), (2480, 8029), (2590, 7688), (2960, 6727), (3472, 5735), (3844, 5180), (4144, 4805), (4340, 4588)]