21000751984

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{263}}^1\times {\mathrm{15451}}^1$

素因数の和:15758

約数の個数: 80

約数和(自身を含む): 45525300480

約数和(自身を除く): 24524548496

約数列:

[1, 2, 4, 8, 16, 17, 19, 34, 38, 68, 76, 136, 152, 263, 272, 304, 323, 526, 646, 1052, 1292, 2104, 2584, 4208, 4471, 4997, 5168, 8942, 9994, 15451, 17884, 19988, 30902, 35768, 39976, 61804, 71536, 79952, 84949, 123608, 169898, 247216, 262667, 293569, 339796, 525334, 587138, 679592, 1050668, 1174276, 1359184, 2101336, 2348552, 4063613, 4202672, 4697104, 4990673, 8127226, 9981346, 16254452, 19962692, 32508904, 39925384, 65017808, 69081421, 77208647, 79850768, 138162842, 154417294, 276325684, 308834588, 552651368, 617669176, 1105302736, 1235338352, 1312546999, 2625093998, 5250187996, 10500375992, 21000751984]

約数ペア:

[(1, 21000751984), (2, 10500375992), (4, 5250187996), (8, 2625093998), (16, 1312546999), (17, 1235338352), (19, 1105302736), (34, 617669176), (38, 552651368), (68, 308834588), (76, 276325684), (136, 154417294), (152, 138162842), (263, 79850768), (272, 77208647), (304, 69081421), (323, 65017808), (526, 39925384), (646, 32508904), (1052, 19962692), (1292, 16254452), (2104, 9981346), (2584, 8127226), (4208, 4990673), (4471, 4697104), (4997, 4202672), (5168, 4063613), (8942, 2348552), (9994, 2101336), (15451, 1359184), (17884, 1174276), (19988, 1050668), (30902, 679592), (35768, 587138), (39976, 525334), (61804, 339796), (71536, 293569), (79952, 262667), (84949, 247216), (123608, 169898)]