21062020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{211}}^1$

素因数の和:281

約数の個数: 96

約数和(自身を含む): 54706176

約数和(自身を除く): 33644156

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 31, 35, 46, 62, 70, 92, 115, 124, 140, 155, 161, 211, 217, 230, 310, 322, 422, 434, 460, 620, 644, 713, 805, 844, 868, 1055, 1085, 1426, 1477, 1610, 2110, 2170, 2852, 2954, 3220, 3565, 4220, 4340, 4853, 4991, 5908, 6541, 7130, 7385, 9706, 9982, 13082, 14260, 14770, 19412, 19964, 24265, 24955, 26164, 29540, 32705, 33971, 45787, 48530, 49910, 65410, 67942, 91574, 97060, 99820, 130820, 135884, 150443, 169855, 183148, 228935, 300886, 339710, 457870, 601772, 679420, 752215, 915740, 1053101, 1504430, 2106202, 3008860, 4212404, 5265505, 10531010, 21062020]

約数ペア:

[(1, 21062020), (2, 10531010), (4, 5265505), (5, 4212404), (7, 3008860), (10, 2106202), (14, 1504430), (20, 1053101), (23, 915740), (28, 752215), (31, 679420), (35, 601772), (46, 457870), (62, 339710), (70, 300886), (92, 228935), (115, 183148), (124, 169855), (140, 150443), (155, 135884), (161, 130820), (211, 99820), (217, 97060), (230, 91574), (310, 67942), (322, 65410), (422, 49910), (434, 48530), (460, 45787), (620, 33971), (644, 32705), (713, 29540), (805, 26164), (844, 24955), (868, 24265), (1055, 19964), (1085, 19412), (1426, 14770), (1477, 14260), (1610, 13082), (2110, 9982), (2170, 9706), (2852, 7385), (2954, 7130), (3220, 6541), (3565, 5908), (4220, 4991), (4340, 4853)]