20299760

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{149}}^1$

素因数の和:306

約数の個数: 80

約数和(自身を含む): 51559200

約数和(自身を除く): 31259440

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 131, 149, 208, 260, 262, 298, 520, 524, 596, 655, 745, 1040, 1048, 1192, 1310, 1490, 1703, 1937, 2096, 2384, 2620, 2980, 3406, 3874, 5240, 5960, 6812, 7748, 8515, 9685, 10480, 11920, 13624, 15496, 17030, 19370, 19519, 27248, 30992, 34060, 38740, 39038, 68120, 77480, 78076, 97595, 136240, 154960, 156152, 195190, 253747, 312304, 390380, 507494, 780760, 1014988, 1268735, 1561520, 2029976, 2537470, 4059952, 5074940, 10149880, 20299760]

約数ペア:

[(1, 20299760), (2, 10149880), (4, 5074940), (5, 4059952), (8, 2537470), (10, 2029976), (13, 1561520), (16, 1268735), (20, 1014988), (26, 780760), (40, 507494), (52, 390380), (65, 312304), (80, 253747), (104, 195190), (130, 156152), (131, 154960), (149, 136240), (208, 97595), (260, 78076), (262, 77480), (298, 68120), (520, 39038), (524, 38740), (596, 34060), (655, 30992), (745, 27248), (1040, 19519), (1048, 19370), (1192, 17030), (1310, 15496), (1490, 13624), (1703, 11920), (1937, 10480), (2096, 9685), (2384, 8515), (2620, 7748), (2980, 6812), (3406, 5960), (3874, 5240)]