20111920

素因数分解:

$2^4\times 5^1\times {\mathrm{59}}^1\times {\mathrm{4261}}^1$

素因数の和:4333

約数の個数: 40

約数和(自身を含む): 47563920

約数和(自身を除く): 27452000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 59, 80, 118, 236, 295, 472, 590, 944, 1180, 2360, 4261, 4720, 8522, 17044, 21305, 34088, 42610, 68176, 85220, 170440, 251399, 340880, 502798, 1005596, 1256995, 2011192, 2513990, 4022384, 5027980, 10055960, 20111920]

約数ペア:

[(1, 20111920), (2, 10055960), (4, 5027980), (5, 4022384), (8, 2513990), (10, 2011192), (16, 1256995), (20, 1005596), (40, 502798), (59, 340880), (80, 251399), (118, 170440), (236, 85220), (295, 68176), (472, 42610), (590, 34088), (944, 21305), (1180, 17044), (2360, 8522), (4261, 4720)]