21110180

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{1657}}^1$

素因数の和:1693

約数の個数: 72

約数和(自身を含む): 55569528

約数和(自身を除く): 34459348

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 49, 52, 65, 70, 91, 98, 130, 140, 182, 196, 245, 260, 364, 455, 490, 637, 910, 980, 1274, 1657, 1820, 2548, 3185, 3314, 6370, 6628, 8285, 11599, 12740, 16570, 21541, 23198, 33140, 43082, 46396, 57995, 81193, 86164, 107705, 115990, 150787, 162386, 215410, 231980, 301574, 324772, 405965, 430820, 603148, 753935, 811930, 1055509, 1507870, 1623860, 2111018, 3015740, 4222036, 5277545, 10555090, 21110180]

約数ペア:

[(1, 21110180), (2, 10555090), (4, 5277545), (5, 4222036), (7, 3015740), (10, 2111018), (13, 1623860), (14, 1507870), (20, 1055509), (26, 811930), (28, 753935), (35, 603148), (49, 430820), (52, 405965), (65, 324772), (70, 301574), (91, 231980), (98, 215410), (130, 162386), (140, 150787), (182, 115990), (196, 107705), (245, 86164), (260, 81193), (364, 57995), (455, 46396), (490, 43082), (637, 33140), (910, 23198), (980, 21541), (1274, 16570), (1657, 12740), (1820, 11599), (2548, 8285), (3185, 6628), (3314, 6370)]