21439220

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{223}}^1$

素因数の和:285

約数の個数: 96

約数和(自身を含む): 54190080

約数和(自身を除く): 32750860

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 23, 38, 44, 46, 55, 76, 92, 95, 110, 115, 190, 209, 220, 223, 230, 253, 380, 418, 437, 446, 460, 506, 836, 874, 892, 1012, 1045, 1115, 1265, 1748, 2090, 2185, 2230, 2453, 2530, 4180, 4237, 4370, 4460, 4807, 4906, 5060, 5129, 8474, 8740, 9614, 9812, 10258, 12265, 16948, 19228, 20516, 21185, 24035, 24530, 25645, 42370, 46607, 48070, 49060, 51290, 56419, 84740, 93214, 96140, 97451, 102580, 112838, 186428, 194902, 225676, 233035, 282095, 389804, 466070, 487255, 564190, 932140, 974510, 1071961, 1128380, 1949020, 2143922, 4287844, 5359805, 10719610, 21439220]

約数ペア:

[(1, 21439220), (2, 10719610), (4, 5359805), (5, 4287844), (10, 2143922), (11, 1949020), (19, 1128380), (20, 1071961), (22, 974510), (23, 932140), (38, 564190), (44, 487255), (46, 466070), (55, 389804), (76, 282095), (92, 233035), (95, 225676), (110, 194902), (115, 186428), (190, 112838), (209, 102580), (220, 97451), (223, 96140), (230, 93214), (253, 84740), (380, 56419), (418, 51290), (437, 49060), (446, 48070), (460, 46607), (506, 42370), (836, 25645), (874, 24530), (892, 24035), (1012, 21185), (1045, 20516), (1115, 19228), (1265, 16948), (1748, 12265), (2090, 10258), (2185, 9812), (2230, 9614), (2453, 8740), (2530, 8474), (4180, 5129), (4237, 5060), (4370, 4906), (4460, 4807)]