21047460

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{7159}}^1$

素因数の和:7185

約数の個数: 72

約数和(自身を含む): 68564160

約数和(自身を除く): 47516700

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 84, 98, 105, 140, 147, 196, 210, 245, 294, 420, 490, 588, 735, 980, 1470, 2940, 7159, 14318, 21477, 28636, 35795, 42954, 50113, 71590, 85908, 100226, 107385, 143180, 150339, 200452, 214770, 250565, 300678, 350791, 429540, 501130, 601356, 701582, 751695, 1002260, 1052373, 1403164, 1503390, 1753955, 2104746, 3006780, 3507910, 4209492, 5261865, 7015820, 10523730, 21047460]

約数ペア:

[(1, 21047460), (2, 10523730), (3, 7015820), (4, 5261865), (5, 4209492), (6, 3507910), (7, 3006780), (10, 2104746), (12, 1753955), (14, 1503390), (15, 1403164), (20, 1052373), (21, 1002260), (28, 751695), (30, 701582), (35, 601356), (42, 501130), (49, 429540), (60, 350791), (70, 300678), (84, 250565), (98, 214770), (105, 200452), (140, 150339), (147, 143180), (196, 107385), (210, 100226), (245, 85908), (294, 71590), (420, 50113), (490, 42954), (588, 35795), (735, 28636), (980, 21477), (1470, 14318), (2940, 7159)]