1980940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{401}}^1$

素因数の和:442

約数の個数: 48

約数和(自身を含む): 4727520

約数和(自身を除く): 2746580

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 130, 190, 247, 260, 380, 401, 494, 802, 988, 1235, 1604, 2005, 2470, 4010, 4940, 5213, 7619, 8020, 10426, 15238, 20852, 26065, 30476, 38095, 52130, 76190, 99047, 104260, 152380, 198094, 396188, 495235, 990470, 1980940]

約数ペア:

[(1, 1980940), (2, 990470), (4, 495235), (5, 396188), (10, 198094), (13, 152380), (19, 104260), (20, 99047), (26, 76190), (38, 52130), (52, 38095), (65, 30476), (76, 26065), (95, 20852), (130, 15238), (190, 10426), (247, 8020), (260, 7619), (380, 5213), (401, 4940), (494, 4010), (802, 2470), (988, 2005), (1235, 1604)]