21142380

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{709}}^1$

素因数の和:799

約数の個数: 96

約数和(自身を含む): 68705280

約数和(自身を除く): 47562900

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 71, 84, 105, 140, 142, 210, 213, 284, 355, 420, 426, 497, 709, 710, 852, 994, 1065, 1418, 1420, 1491, 1988, 2127, 2130, 2485, 2836, 2982, 3545, 4254, 4260, 4963, 4970, 5964, 7090, 7455, 8508, 9926, 9940, 10635, 14180, 14889, 14910, 19852, 21270, 24815, 29778, 29820, 42540, 49630, 50339, 59556, 74445, 99260, 100678, 148890, 151017, 201356, 251695, 297780, 302034, 352373, 503390, 604068, 704746, 755085, 1006780, 1057119, 1409492, 1510170, 1761865, 2114238, 3020340, 3523730, 4228476, 5285595, 7047460, 10571190, 21142380]

約数ペア:

[(1, 21142380), (2, 10571190), (3, 7047460), (4, 5285595), (5, 4228476), (6, 3523730), (7, 3020340), (10, 2114238), (12, 1761865), (14, 1510170), (15, 1409492), (20, 1057119), (21, 1006780), (28, 755085), (30, 704746), (35, 604068), (42, 503390), (60, 352373), (70, 302034), (71, 297780), (84, 251695), (105, 201356), (140, 151017), (142, 148890), (210, 100678), (213, 99260), (284, 74445), (355, 59556), (420, 50339), (426, 49630), (497, 42540), (709, 29820), (710, 29778), (852, 24815), (994, 21270), (1065, 19852), (1418, 14910), (1420, 14889), (1491, 14180), (1988, 10635), (2127, 9940), (2130, 9926), (2485, 8508), (2836, 7455), (2982, 7090), (3545, 5964), (4254, 4970), (4260, 4963)]