19987520

素因数分解:

$2^6\times 5^1\times 7^1\times {\mathrm{8923}}^1$

素因数の和:8947

約数の個数: 56

約数和(自身を含む): 54400704

約数和(自身を除く): 34413184

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 64, 70, 80, 112, 140, 160, 224, 280, 320, 448, 560, 1120, 2240, 8923, 17846, 35692, 44615, 62461, 71384, 89230, 124922, 142768, 178460, 249844, 285536, 312305, 356920, 499688, 571072, 624610, 713840, 999376, 1249220, 1427680, 1998752, 2498440, 2855360, 3997504, 4996880, 9993760, 19987520]

約数ペア:

[(1, 19987520), (2, 9993760), (4, 4996880), (5, 3997504), (7, 2855360), (8, 2498440), (10, 1998752), (14, 1427680), (16, 1249220), (20, 999376), (28, 713840), (32, 624610), (35, 571072), (40, 499688), (56, 356920), (64, 312305), (70, 285536), (80, 249844), (112, 178460), (140, 142768), (160, 124922), (224, 89230), (280, 71384), (320, 62461), (448, 44615), (560, 35692), (1120, 17846), (2240, 8923)]