21488320

素因数分解:

$2^6\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{181}}^1$

素因数の和:258

約数の個数: 112

約数和(自身を含む): 59911488

約数和(自身を除く): 38423168

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 53, 56, 64, 70, 80, 106, 112, 140, 160, 181, 212, 224, 265, 280, 320, 362, 371, 424, 448, 530, 560, 724, 742, 848, 905, 1060, 1120, 1267, 1448, 1484, 1696, 1810, 1855, 2120, 2240, 2534, 2896, 2968, 3392, 3620, 3710, 4240, 5068, 5792, 5936, 6335, 7240, 7420, 8480, 9593, 10136, 11584, 11872, 12670, 14480, 14840, 16960, 19186, 20272, 23744, 25340, 28960, 29680, 38372, 40544, 47965, 50680, 57920, 59360, 67151, 76744, 81088, 95930, 101360, 118720, 134302, 153488, 191860, 202720, 268604, 306976, 335755, 383720, 405440, 537208, 613952, 671510, 767440, 1074416, 1343020, 1534880, 2148832, 2686040, 3069760, 4297664, 5372080, 10744160, 21488320]

約数ペア:

[(1, 21488320), (2, 10744160), (4, 5372080), (5, 4297664), (7, 3069760), (8, 2686040), (10, 2148832), (14, 1534880), (16, 1343020), (20, 1074416), (28, 767440), (32, 671510), (35, 613952), (40, 537208), (53, 405440), (56, 383720), (64, 335755), (70, 306976), (80, 268604), (106, 202720), (112, 191860), (140, 153488), (160, 134302), (181, 118720), (212, 101360), (224, 95930), (265, 81088), (280, 76744), (320, 67151), (362, 59360), (371, 57920), (424, 50680), (448, 47965), (530, 40544), (560, 38372), (724, 29680), (742, 28960), (848, 25340), (905, 23744), (1060, 20272), (1120, 19186), (1267, 16960), (1448, 14840), (1484, 14480), (1696, 12670), (1810, 11872), (1855, 11584), (2120, 10136), (2240, 9593), (2534, 8480), (2896, 7420), (2968, 7240), (3392, 6335), (3620, 5936), (3710, 5792), (4240, 5068)]