19929920

素因数分解:

$2^6\times 5^1\times {\mathrm{61}}^1\times {\mathrm{1021}}^1$

素因数の和:1099

約数の個数: 56

約数和(自身を含む): 48283368

約数和(自身を除く): 28353448

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 61, 64, 80, 122, 160, 244, 305, 320, 488, 610, 976, 1021, 1220, 1952, 2042, 2440, 3904, 4084, 4880, 5105, 8168, 9760, 10210, 16336, 19520, 20420, 32672, 40840, 62281, 65344, 81680, 124562, 163360, 249124, 311405, 326720, 498248, 622810, 996496, 1245620, 1992992, 2491240, 3985984, 4982480, 9964960, 19929920]

約数ペア:

[(1, 19929920), (2, 9964960), (4, 4982480), (5, 3985984), (8, 2491240), (10, 1992992), (16, 1245620), (20, 996496), (32, 622810), (40, 498248), (61, 326720), (64, 311405), (80, 249124), (122, 163360), (160, 124562), (244, 81680), (305, 65344), (320, 62281), (488, 40840), (610, 32672), (976, 20420), (1021, 19520), (1220, 16336), (1952, 10210), (2042, 9760), (2440, 8168), (3904, 5105), (4084, 4880)]