28157440

素因数分解:

$2^9\times 5^1\times {\mathrm{17}}^1\times {\mathrm{647}}^1$

素因数の和:687

約数の個数: 80

約数和(自身を含む): 71593632

約数和(自身を除く): 43436192

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 128, 136, 160, 170, 256, 272, 320, 340, 512, 544, 640, 647, 680, 1088, 1280, 1294, 1360, 2176, 2560, 2588, 2720, 3235, 4352, 5176, 5440, 6470, 8704, 10352, 10880, 10999, 12940, 20704, 21760, 21998, 25880, 41408, 43520, 43996, 51760, 54995, 82816, 87992, 103520, 109990, 165632, 175984, 207040, 219980, 331264, 351968, 414080, 439960, 703936, 828160, 879920, 1407872, 1656320, 1759840, 2815744, 3519680, 5631488, 7039360, 14078720, 28157440]

約数ペア:

[(1, 28157440), (2, 14078720), (4, 7039360), (5, 5631488), (8, 3519680), (10, 2815744), (16, 1759840), (17, 1656320), (20, 1407872), (32, 879920), (34, 828160), (40, 703936), (64, 439960), (68, 414080), (80, 351968), (85, 331264), (128, 219980), (136, 207040), (160, 175984), (170, 165632), (256, 109990), (272, 103520), (320, 87992), (340, 82816), (512, 54995), (544, 51760), (640, 43996), (647, 43520), (680, 41408), (1088, 25880), (1280, 21998), (1294, 21760), (1360, 20704), (2176, 12940), (2560, 10999), (2588, 10880), (2720, 10352), (3235, 8704), (4352, 6470), (5176, 5440)]