19997292

素因数分解:

$2^2\times 3^1\times 7^2\times {\mathrm{71}}^1\times {\mathrm{479}}^1$

素因数の和:571

約数の個数: 72

約数和(自身を含む): 55157760

約数和(自身を除く): 35160468

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 49, 71, 84, 98, 142, 147, 196, 213, 284, 294, 426, 479, 497, 588, 852, 958, 994, 1437, 1491, 1916, 1988, 2874, 2982, 3353, 3479, 5748, 5964, 6706, 6958, 10059, 10437, 13412, 13916, 20118, 20874, 23471, 34009, 40236, 41748, 46942, 68018, 70413, 93884, 102027, 136036, 140826, 204054, 238063, 281652, 408108, 476126, 714189, 952252, 1428378, 1666441, 2856756, 3332882, 4999323, 6665764, 9998646, 19997292]

約数ペア:

[(1, 19997292), (2, 9998646), (3, 6665764), (4, 4999323), (6, 3332882), (7, 2856756), (12, 1666441), (14, 1428378), (21, 952252), (28, 714189), (42, 476126), (49, 408108), (71, 281652), (84, 238063), (98, 204054), (142, 140826), (147, 136036), (196, 102027), (213, 93884), (284, 70413), (294, 68018), (426, 46942), (479, 41748), (497, 40236), (588, 34009), (852, 23471), (958, 20874), (994, 20118), (1437, 13916), (1491, 13412), (1916, 10437), (1988, 10059), (2874, 6958), (2982, 6706), (3353, 5964), (3479, 5748)]