21000814940

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{137}}^1\times {\mathrm{156419}}^1$

素因数の和:156579

約数の個数: 72

約数和(自身を含む): 51676788240

約数和(自身を除く): 30675973300

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 137, 140, 196, 245, 274, 490, 548, 685, 959, 980, 1370, 1918, 2740, 3836, 4795, 6713, 9590, 13426, 19180, 26852, 33565, 67130, 134260, 156419, 312838, 625676, 782095, 1094933, 1564190, 2189866, 3128380, 4379732, 5474665, 7664531, 10949330, 15329062, 21429403, 21898660, 30658124, 38322655, 42858806, 76645310, 85717612, 107147015, 150005821, 153290620, 214294030, 300011642, 428588060, 600023284, 750029105, 1050040747, 1500058210, 2100081494, 3000116420, 4200162988, 5250203735, 10500407470, 21000814940]

約数ペア:

[(1, 21000814940), (2, 10500407470), (4, 5250203735), (5, 4200162988), (7, 3000116420), (10, 2100081494), (14, 1500058210), (20, 1050040747), (28, 750029105), (35, 600023284), (49, 428588060), (70, 300011642), (98, 214294030), (137, 153290620), (140, 150005821), (196, 107147015), (245, 85717612), (274, 76645310), (490, 42858806), (548, 38322655), (685, 30658124), (959, 21898660), (980, 21429403), (1370, 15329062), (1918, 10949330), (2740, 7664531), (3836, 5474665), (4795, 4379732), (6713, 3128380), (9590, 2189866), (13426, 1564190), (19180, 1094933), (26852, 782095), (33565, 625676), (67130, 312838), (134260, 156419)]