20487040

素因数分解:

$2^7\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{269}}^1$

素因数の和:312

約数の個数: 128

約数和(自身を含む): 59486400

約数和(自身を除く): 38999360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 17, 20, 28, 32, 34, 35, 40, 56, 64, 68, 70, 80, 85, 112, 119, 128, 136, 140, 160, 170, 224, 238, 269, 272, 280, 320, 340, 448, 476, 538, 544, 560, 595, 640, 680, 896, 952, 1076, 1088, 1120, 1190, 1345, 1360, 1883, 1904, 2152, 2176, 2240, 2380, 2690, 2720, 3766, 3808, 4304, 4480, 4573, 4760, 5380, 5440, 7532, 7616, 8608, 9146, 9415, 9520, 10760, 10880, 15064, 15232, 17216, 18292, 18830, 19040, 21520, 22865, 30128, 32011, 34432, 36584, 37660, 38080, 43040, 45730, 60256, 64022, 73168, 75320, 76160, 86080, 91460, 120512, 128044, 146336, 150640, 160055, 172160, 182920, 241024, 256088, 292672, 301280, 320110, 365840, 512176, 585344, 602560, 640220, 731680, 1024352, 1205120, 1280440, 1463360, 2048704, 2560880, 2926720, 4097408, 5121760, 10243520, 20487040]

約数ペア:

[(1, 20487040), (2, 10243520), (4, 5121760), (5, 4097408), (7, 2926720), (8, 2560880), (10, 2048704), (14, 1463360), (16, 1280440), (17, 1205120), (20, 1024352), (28, 731680), (32, 640220), (34, 602560), (35, 585344), (40, 512176), (56, 365840), (64, 320110), (68, 301280), (70, 292672), (80, 256088), (85, 241024), (112, 182920), (119, 172160), (128, 160055), (136, 150640), (140, 146336), (160, 128044), (170, 120512), (224, 91460), (238, 86080), (269, 76160), (272, 75320), (280, 73168), (320, 64022), (340, 60256), (448, 45730), (476, 43040), (538, 38080), (544, 37660), (560, 36584), (595, 34432), (640, 32011), (680, 30128), (896, 22865), (952, 21520), (1076, 19040), (1088, 18830), (1120, 18292), (1190, 17216), (1345, 15232), (1360, 15064), (1883, 10880), (1904, 10760), (2152, 9520), (2176, 9415), (2240, 9146), (2380, 8608), (2690, 7616), (2720, 7532), (3766, 5440), (3808, 5380), (4304, 4760), (4480, 4573)]