19981312

素因数分解:

$2^{10}\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1$

素因数の和:131

約数の個数: 88

約数和(自身を含む): 45852800

約数和(自身を除く): 25871488

約数列:

[1, 2, 4, 8, 13, 16, 19, 26, 32, 38, 52, 64, 76, 79, 104, 128, 152, 158, 208, 247, 256, 304, 316, 416, 494, 512, 608, 632, 832, 988, 1024, 1027, 1216, 1264, 1501, 1664, 1976, 2054, 2432, 2528, 3002, 3328, 3952, 4108, 4864, 5056, 6004, 6656, 7904, 8216, 9728, 10112, 12008, 13312, 15808, 16432, 19456, 19513, 20224, 24016, 31616, 32864, 39026, 40448, 48032, 63232, 65728, 78052, 80896, 96064, 126464, 131456, 156104, 192128, 252928, 262912, 312208, 384256, 525824, 624416, 768512, 1051648, 1248832, 1537024, 2497664, 4995328, 9990656, 19981312]

約数ペア:

[(1, 19981312), (2, 9990656), (4, 4995328), (8, 2497664), (13, 1537024), (16, 1248832), (19, 1051648), (26, 768512), (32, 624416), (38, 525824), (52, 384256), (64, 312208), (76, 262912), (79, 252928), (104, 192128), (128, 156104), (152, 131456), (158, 126464), (208, 96064), (247, 80896), (256, 78052), (304, 65728), (316, 63232), (416, 48032), (494, 40448), (512, 39026), (608, 32864), (632, 31616), (832, 24016), (988, 20224), (1024, 19513), (1027, 19456), (1216, 16432), (1264, 15808), (1501, 13312), (1664, 12008), (1976, 10112), (2054, 9728), (2432, 8216), (2528, 7904), (3002, 6656), (3328, 6004), (3952, 5056), (4108, 4864)]