19839640

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{173}}^1$

素因数の和:292

約数の個数: 64

約数和(自身を含む): 46604160

約数和(自身を除く): 26764520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 61, 94, 122, 173, 188, 235, 244, 305, 346, 376, 470, 488, 610, 692, 865, 940, 1220, 1384, 1730, 1880, 2440, 2867, 3460, 5734, 6920, 8131, 10553, 11468, 14335, 16262, 21106, 22936, 28670, 32524, 40655, 42212, 52765, 57340, 65048, 81310, 84424, 105530, 114680, 162620, 211060, 325240, 422120, 495991, 991982, 1983964, 2479955, 3967928, 4959910, 9919820, 19839640]

約数ペア:

[(1, 19839640), (2, 9919820), (4, 4959910), (5, 3967928), (8, 2479955), (10, 1983964), (20, 991982), (40, 495991), (47, 422120), (61, 325240), (94, 211060), (122, 162620), (173, 114680), (188, 105530), (235, 84424), (244, 81310), (305, 65048), (346, 57340), (376, 52765), (470, 42212), (488, 40655), (610, 32524), (692, 28670), (865, 22936), (940, 21106), (1220, 16262), (1384, 14335), (1730, 11468), (1880, 10553), (2440, 8131), (2867, 6920), (3460, 5734)]