81192020

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{6373}}^1$

素因数の和:6409

約数の個数: 72

約数和(自身を含む): 213630984

約数和(自身を除く): 132438964

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 49, 52, 65, 70, 91, 98, 130, 140, 182, 196, 245, 260, 364, 455, 490, 637, 910, 980, 1274, 1820, 2548, 3185, 6370, 6373, 12740, 12746, 25492, 31865, 44611, 63730, 82849, 89222, 127460, 165698, 178444, 223055, 312277, 331396, 414245, 446110, 579943, 624554, 828490, 892220, 1159886, 1249108, 1561385, 1656980, 2319772, 2899715, 3122770, 4059601, 5799430, 6245540, 8119202, 11598860, 16238404, 20298005, 40596010, 81192020]

約数ペア:

[(1, 81192020), (2, 40596010), (4, 20298005), (5, 16238404), (7, 11598860), (10, 8119202), (13, 6245540), (14, 5799430), (20, 4059601), (26, 3122770), (28, 2899715), (35, 2319772), (49, 1656980), (52, 1561385), (65, 1249108), (70, 1159886), (91, 892220), (98, 828490), (130, 624554), (140, 579943), (182, 446110), (196, 414245), (245, 331396), (260, 312277), (364, 223055), (455, 178444), (490, 165698), (637, 127460), (910, 89222), (980, 82849), (1274, 63730), (1820, 44611), (2548, 31865), (3185, 25492), (6370, 12746), (6373, 12740)]