19201780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^3\times {\mathrm{19}}^1\times {\mathrm{23}}^1$

素因数の和:90

約数の個数: 96

約数和(自身を含む): 47980800

約数和(自身を除く): 28779020

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 23, 26, 38, 46, 52, 65, 76, 92, 95, 115, 130, 169, 190, 230, 247, 260, 299, 338, 380, 437, 460, 494, 598, 676, 845, 874, 988, 1196, 1235, 1495, 1690, 1748, 2185, 2197, 2470, 2990, 3211, 3380, 3887, 4370, 4394, 4940, 5681, 5980, 6422, 7774, 8740, 8788, 10985, 11362, 12844, 15548, 16055, 19435, 21970, 22724, 28405, 32110, 38870, 41743, 43940, 50531, 56810, 64220, 73853, 77740, 83486, 101062, 113620, 147706, 166972, 202124, 208715, 252655, 295412, 369265, 417430, 505310, 738530, 834860, 960089, 1010620, 1477060, 1920178, 3840356, 4800445, 9600890, 19201780]

約数ペア:

[(1, 19201780), (2, 9600890), (4, 4800445), (5, 3840356), (10, 1920178), (13, 1477060), (19, 1010620), (20, 960089), (23, 834860), (26, 738530), (38, 505310), (46, 417430), (52, 369265), (65, 295412), (76, 252655), (92, 208715), (95, 202124), (115, 166972), (130, 147706), (169, 113620), (190, 101062), (230, 83486), (247, 77740), (260, 73853), (299, 64220), (338, 56810), (380, 50531), (437, 43940), (460, 41743), (494, 38870), (598, 32110), (676, 28405), (845, 22724), (874, 21970), (988, 19435), (1196, 16055), (1235, 15548), (1495, 12844), (1690, 11362), (1748, 10985), (2185, 8788), (2197, 8740), (2470, 7774), (2990, 6422), (3211, 5980), (3380, 5681), (3887, 4940), (4370, 4394)]