20357820

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{151}}^1$

素因数の和:280

約数の個数: 144

約数和(自身を含む): 71705088

約数和(自身を除く): 51347268

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 107, 126, 140, 151, 180, 210, 214, 252, 302, 315, 321, 420, 428, 453, 535, 604, 630, 642, 749, 755, 906, 963, 1057, 1070, 1260, 1284, 1359, 1498, 1510, 1605, 1812, 1926, 2114, 2140, 2247, 2265, 2718, 2996, 3020, 3171, 3210, 3745, 3852, 4228, 4494, 4530, 4815, 5285, 5436, 6342, 6420, 6741, 6795, 7490, 8988, 9060, 9513, 9630, 10570, 11235, 12684, 13482, 13590, 14980, 15855, 16157, 19026, 19260, 21140, 22470, 26964, 27180, 31710, 32314, 33705, 38052, 44940, 47565, 48471, 63420, 64628, 67410, 80785, 95130, 96942, 113099, 134820, 145413, 161570, 190260, 193884, 226198, 242355, 290826, 323140, 339297, 452396, 484710, 565495, 581652, 678594, 727065, 969420, 1017891, 1130990, 1357188, 1454130, 1696485, 2035782, 2261980, 2908260, 3392970, 4071564, 5089455, 6785940, 10178910, 20357820]

約数ペア:

[(1, 20357820), (2, 10178910), (3, 6785940), (4, 5089455), (5, 4071564), (6, 3392970), (7, 2908260), (9, 2261980), (10, 2035782), (12, 1696485), (14, 1454130), (15, 1357188), (18, 1130990), (20, 1017891), (21, 969420), (28, 727065), (30, 678594), (35, 581652), (36, 565495), (42, 484710), (45, 452396), (60, 339297), (63, 323140), (70, 290826), (84, 242355), (90, 226198), (105, 193884), (107, 190260), (126, 161570), (140, 145413), (151, 134820), (180, 113099), (210, 96942), (214, 95130), (252, 80785), (302, 67410), (315, 64628), (321, 63420), (420, 48471), (428, 47565), (453, 44940), (535, 38052), (604, 33705), (630, 32314), (642, 31710), (749, 27180), (755, 26964), (906, 22470), (963, 21140), (1057, 19260), (1070, 19026), (1260, 16157), (1284, 15855), (1359, 14980), (1498, 13590), (1510, 13482), (1605, 12684), (1812, 11235), (1926, 10570), (2114, 9630), (2140, 9513), (2247, 9060), (2265, 8988), (2718, 7490), (2996, 6795), (3020, 6741), (3171, 6420), (3210, 6342), (3745, 5436), (3852, 5285), (4228, 4815), (4494, 4530)]