19958016

素因数分解:

$2^8\times 3^1\times {\mathrm{13}}^1\times {\mathrm{1999}}^1$

素因数の和:2031

約数の個数: 72

約数和(自身を含む): 57232000

約数和(自身を除く): 37273984

約数列:

[1, 2, 3, 4, 6, 8, 12, 13, 16, 24, 26, 32, 39, 48, 52, 64, 78, 96, 104, 128, 156, 192, 208, 256, 312, 384, 416, 624, 768, 832, 1248, 1664, 1999, 2496, 3328, 3998, 4992, 5997, 7996, 9984, 11994, 15992, 23988, 25987, 31984, 47976, 51974, 63968, 77961, 95952, 103948, 127936, 155922, 191904, 207896, 255872, 311844, 383808, 415792, 511744, 623688, 767616, 831584, 1247376, 1535232, 1663168, 2494752, 3326336, 4989504, 6652672, 9979008, 19958016]

約数ペア:

[(1, 19958016), (2, 9979008), (3, 6652672), (4, 4989504), (6, 3326336), (8, 2494752), (12, 1663168), (13, 1535232), (16, 1247376), (24, 831584), (26, 767616), (32, 623688), (39, 511744), (48, 415792), (52, 383808), (64, 311844), (78, 255872), (96, 207896), (104, 191904), (128, 155922), (156, 127936), (192, 103948), (208, 95952), (256, 77961), (312, 63968), (384, 51974), (416, 47976), (624, 31984), (768, 25987), (832, 23988), (1248, 15992), (1664, 11994), (1999, 9984), (2496, 7996), (3328, 5997), (3998, 4992)]