20708480

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1$

素因数の和:182

約数の個数: 128

約数和(自身を含む): 56548800

約数和(自身を除く): 35840320

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 19, 20, 26, 32, 38, 40, 52, 64, 65, 76, 80, 95, 104, 128, 130, 131, 152, 160, 190, 208, 247, 260, 262, 304, 320, 380, 416, 494, 520, 524, 608, 640, 655, 760, 832, 988, 1040, 1048, 1216, 1235, 1310, 1520, 1664, 1703, 1976, 2080, 2096, 2432, 2470, 2489, 2620, 3040, 3406, 3952, 4160, 4192, 4940, 4978, 5240, 6080, 6812, 7904, 8320, 8384, 8515, 9880, 9956, 10480, 12160, 12445, 13624, 15808, 16768, 17030, 19760, 19912, 20960, 24890, 27248, 31616, 32357, 34060, 39520, 39824, 41920, 49780, 54496, 64714, 68120, 79040, 79648, 83840, 99560, 108992, 129428, 136240, 158080, 159296, 161785, 199120, 217984, 258856, 272480, 318592, 323570, 398240, 517712, 544960, 647140, 796480, 1035424, 1089920, 1294280, 1592960, 2070848, 2588560, 4141696, 5177120, 10354240, 20708480]

約数ペア:

[(1, 20708480), (2, 10354240), (4, 5177120), (5, 4141696), (8, 2588560), (10, 2070848), (13, 1592960), (16, 1294280), (19, 1089920), (20, 1035424), (26, 796480), (32, 647140), (38, 544960), (40, 517712), (52, 398240), (64, 323570), (65, 318592), (76, 272480), (80, 258856), (95, 217984), (104, 199120), (128, 161785), (130, 159296), (131, 158080), (152, 136240), (160, 129428), (190, 108992), (208, 99560), (247, 83840), (260, 79648), (262, 79040), (304, 68120), (320, 64714), (380, 54496), (416, 49780), (494, 41920), (520, 39824), (524, 39520), (608, 34060), (640, 32357), (655, 31616), (760, 27248), (832, 24890), (988, 20960), (1040, 19912), (1048, 19760), (1216, 17030), (1235, 16768), (1310, 15808), (1520, 13624), (1664, 12445), (1703, 12160), (1976, 10480), (2080, 9956), (2096, 9880), (2432, 8515), (2470, 8384), (2489, 8320), (2620, 7904), (3040, 6812), (3406, 6080), (3952, 5240), (4160, 4978), (4192, 4940)]