20810240

素因数分解:

$2^9\times 5^1\times {\mathrm{11}}^1\times {\mathrm{739}}^1$

素因数の和:773

約数の個数: 80

約数和(自身を含む): 54505440

約数和(自身を除く): 33695200

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 64, 80, 88, 110, 128, 160, 176, 220, 256, 320, 352, 440, 512, 640, 704, 739, 880, 1280, 1408, 1478, 1760, 2560, 2816, 2956, 3520, 3695, 5632, 5912, 7040, 7390, 8129, 11824, 14080, 14780, 16258, 23648, 28160, 29560, 32516, 40645, 47296, 59120, 65032, 81290, 94592, 118240, 130064, 162580, 189184, 236480, 260128, 325160, 378368, 472960, 520256, 650320, 945920, 1040512, 1300640, 1891840, 2081024, 2601280, 4162048, 5202560, 10405120, 20810240]

約数ペア:

[(1, 20810240), (2, 10405120), (4, 5202560), (5, 4162048), (8, 2601280), (10, 2081024), (11, 1891840), (16, 1300640), (20, 1040512), (22, 945920), (32, 650320), (40, 520256), (44, 472960), (55, 378368), (64, 325160), (80, 260128), (88, 236480), (110, 189184), (128, 162580), (160, 130064), (176, 118240), (220, 94592), (256, 81290), (320, 65032), (352, 59120), (440, 47296), (512, 40645), (640, 32516), (704, 29560), (739, 28160), (880, 23648), (1280, 16258), (1408, 14780), (1478, 14080), (1760, 11824), (2560, 8129), (2816, 7390), (2956, 7040), (3520, 5912), (3695, 5632)]