21691040

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{181}}^1$

素因数の和:310

約数の個数: 96

約数和(自身を含む): 59439744

約数和(自身を除く): 37748704

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 80, 107, 112, 140, 160, 181, 214, 224, 280, 362, 428, 535, 560, 724, 749, 856, 905, 1070, 1120, 1267, 1448, 1498, 1712, 1810, 2140, 2534, 2896, 2996, 3424, 3620, 3745, 4280, 5068, 5792, 5992, 6335, 7240, 7490, 8560, 10136, 11984, 12670, 14480, 14980, 17120, 19367, 20272, 23968, 25340, 28960, 29960, 38734, 40544, 50680, 59920, 77468, 96835, 101360, 119840, 135569, 154936, 193670, 202720, 271138, 309872, 387340, 542276, 619744, 677845, 774680, 1084552, 1355690, 1549360, 2169104, 2711380, 3098720, 4338208, 5422760, 10845520, 21691040]

約数ペア:

[(1, 21691040), (2, 10845520), (4, 5422760), (5, 4338208), (7, 3098720), (8, 2711380), (10, 2169104), (14, 1549360), (16, 1355690), (20, 1084552), (28, 774680), (32, 677845), (35, 619744), (40, 542276), (56, 387340), (70, 309872), (80, 271138), (107, 202720), (112, 193670), (140, 154936), (160, 135569), (181, 119840), (214, 101360), (224, 96835), (280, 77468), (362, 59920), (428, 50680), (535, 40544), (560, 38734), (724, 29960), (749, 28960), (856, 25340), (905, 23968), (1070, 20272), (1120, 19367), (1267, 17120), (1448, 14980), (1498, 14480), (1712, 12670), (1810, 11984), (2140, 10136), (2534, 8560), (2896, 7490), (2996, 7240), (3424, 6335), (3620, 5992), (3745, 5792), (4280, 5068)]