21243768

素因数分解:

$2^3\times 3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{137}}^1$

素因数の和:237

約数の個数: 128

約数和(自身を含む): 66769920

約数和(自身を除く): 45526152

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 13, 14, 21, 24, 26, 28, 39, 42, 52, 56, 71, 78, 84, 91, 104, 137, 142, 156, 168, 182, 213, 273, 274, 284, 312, 364, 411, 426, 497, 546, 548, 568, 728, 822, 852, 923, 959, 994, 1092, 1096, 1491, 1644, 1704, 1781, 1846, 1918, 1988, 2184, 2769, 2877, 2982, 3288, 3562, 3692, 3836, 3976, 5343, 5538, 5754, 5964, 6461, 7124, 7384, 7672, 9727, 10686, 11076, 11508, 11928, 12467, 12922, 14248, 19383, 19454, 21372, 22152, 23016, 24934, 25844, 29181, 37401, 38766, 38908, 42744, 49868, 51688, 58362, 68089, 74802, 77532, 77816, 99736, 116724, 126451, 136178, 149604, 155064, 204267, 233448, 252902, 272356, 299208, 379353, 408534, 505804, 544712, 758706, 817068, 885157, 1011608, 1517412, 1634136, 1770314, 2655471, 3034824, 3540628, 5310942, 7081256, 10621884, 21243768]

約数ペア:

[(1, 21243768), (2, 10621884), (3, 7081256), (4, 5310942), (6, 3540628), (7, 3034824), (8, 2655471), (12, 1770314), (13, 1634136), (14, 1517412), (21, 1011608), (24, 885157), (26, 817068), (28, 758706), (39, 544712), (42, 505804), (52, 408534), (56, 379353), (71, 299208), (78, 272356), (84, 252902), (91, 233448), (104, 204267), (137, 155064), (142, 149604), (156, 136178), (168, 126451), (182, 116724), (213, 99736), (273, 77816), (274, 77532), (284, 74802), (312, 68089), (364, 58362), (411, 51688), (426, 49868), (497, 42744), (546, 38908), (548, 38766), (568, 37401), (728, 29181), (822, 25844), (852, 24934), (923, 23016), (959, 22152), (994, 21372), (1092, 19454), (1096, 19383), (1491, 14248), (1644, 12922), (1704, 12467), (1781, 11928), (1846, 11508), (1918, 11076), (1988, 10686), (2184, 9727), (2769, 7672), (2877, 7384), (2982, 7124), (3288, 6461), (3562, 5964), (3692, 5754), (3836, 5538), (3976, 5343)]