26987980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1$

素因数の和:167

約数の個数: 96

約数和(自身を含む): 64512000

約数和(自身を除く): 37524020

約数列:

[1, 2, 4, 5, 10, 19, 20, 29, 31, 38, 58, 62, 76, 79, 95, 116, 124, 145, 155, 158, 190, 290, 310, 316, 380, 395, 551, 580, 589, 620, 790, 899, 1102, 1178, 1501, 1580, 1798, 2204, 2291, 2356, 2449, 2755, 2945, 3002, 3596, 4495, 4582, 4898, 5510, 5890, 6004, 7505, 8990, 9164, 9796, 11020, 11455, 11780, 12245, 15010, 17081, 17980, 22910, 24490, 30020, 34162, 43529, 45820, 46531, 48980, 68324, 71021, 85405, 87058, 93062, 142042, 170810, 174116, 186124, 217645, 232655, 284084, 341620, 355105, 435290, 465310, 710210, 870580, 930620, 1349399, 1420420, 2698798, 5397596, 6746995, 13493990, 26987980]

約数ペア:

[(1, 26987980), (2, 13493990), (4, 6746995), (5, 5397596), (10, 2698798), (19, 1420420), (20, 1349399), (29, 930620), (31, 870580), (38, 710210), (58, 465310), (62, 435290), (76, 355105), (79, 341620), (95, 284084), (116, 232655), (124, 217645), (145, 186124), (155, 174116), (158, 170810), (190, 142042), (290, 93062), (310, 87058), (316, 85405), (380, 71021), (395, 68324), (551, 48980), (580, 46531), (589, 45820), (620, 43529), (790, 34162), (899, 30020), (1102, 24490), (1178, 22910), (1501, 17980), (1580, 17081), (1798, 15010), (2204, 12245), (2291, 11780), (2356, 11455), (2449, 11020), (2755, 9796), (2945, 9164), (3002, 8990), (3596, 7505), (4495, 6004), (4582, 5890), (4898, 5510)]