21008208

素因数分解:

$2^4\times 3^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{257}}^1$

素因数の和:412

約数の個数: 80

約数和(自身を含む): 59121216

約数和(自身を除く): 38113008

約数列:

[1, 2, 3, 4, 6, 8, 12, 13, 16, 24, 26, 39, 48, 52, 78, 104, 131, 156, 208, 257, 262, 312, 393, 514, 524, 624, 771, 786, 1028, 1048, 1542, 1572, 1703, 2056, 2096, 3084, 3144, 3341, 3406, 4112, 5109, 6168, 6288, 6682, 6812, 10023, 10218, 12336, 13364, 13624, 20046, 20436, 26728, 27248, 33667, 40092, 40872, 53456, 67334, 80184, 81744, 101001, 134668, 160368, 202002, 269336, 404004, 437671, 538672, 808008, 875342, 1313013, 1616016, 1750684, 2626026, 3501368, 5252052, 7002736, 10504104, 21008208]

約数ペア:

[(1, 21008208), (2, 10504104), (3, 7002736), (4, 5252052), (6, 3501368), (8, 2626026), (12, 1750684), (13, 1616016), (16, 1313013), (24, 875342), (26, 808008), (39, 538672), (48, 437671), (52, 404004), (78, 269336), (104, 202002), (131, 160368), (156, 134668), (208, 101001), (257, 81744), (262, 80184), (312, 67334), (393, 53456), (514, 40872), (524, 40092), (624, 33667), (771, 27248), (786, 26728), (1028, 20436), (1048, 20046), (1542, 13624), (1572, 13364), (1703, 12336), (2056, 10218), (2096, 10023), (3084, 6812), (3144, 6682), (3341, 6288), (3406, 6168), (4112, 5109)]