19726720

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{2371}}^1$

素因数の和:2403

約数の個数: 64

約数和(自身を含む): 50808240

約数和(自身を除く): 31081520

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 260, 320, 416, 520, 640, 832, 1040, 1664, 2080, 2371, 4160, 4742, 8320, 9484, 11855, 18968, 23710, 30823, 37936, 47420, 61646, 75872, 94840, 123292, 151744, 154115, 189680, 246584, 303488, 308230, 379360, 493168, 616460, 758720, 986336, 1232920, 1517440, 1972672, 2465840, 3945344, 4931680, 9863360, 19726720]

約数ペア:

[(1, 19726720), (2, 9863360), (4, 4931680), (5, 3945344), (8, 2465840), (10, 1972672), (13, 1517440), (16, 1232920), (20, 986336), (26, 758720), (32, 616460), (40, 493168), (52, 379360), (64, 308230), (65, 303488), (80, 246584), (104, 189680), (128, 154115), (130, 151744), (160, 123292), (208, 94840), (260, 75872), (320, 61646), (416, 47420), (520, 37936), (640, 30823), (832, 23710), (1040, 18968), (1664, 11855), (2080, 9484), (2371, 8320), (4160, 4742)]