21478740

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{83}}^1\times {\mathrm{227}}^1$

素因数の和:341

約数の個数: 96

約数和(自身を含む): 64350720

約数和(自身を除く): 42871980

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 19, 20, 30, 38, 57, 60, 76, 83, 95, 114, 166, 190, 227, 228, 249, 285, 332, 380, 415, 454, 498, 570, 681, 830, 908, 996, 1135, 1140, 1245, 1362, 1577, 1660, 2270, 2490, 2724, 3154, 3405, 4313, 4540, 4731, 4980, 6308, 6810, 7885, 8626, 9462, 12939, 13620, 15770, 17252, 18841, 18924, 21565, 23655, 25878, 31540, 37682, 43130, 47310, 51756, 56523, 64695, 75364, 86260, 94205, 94620, 113046, 129390, 188410, 226092, 258780, 282615, 357979, 376820, 565230, 715958, 1073937, 1130460, 1431916, 1789895, 2147874, 3579790, 4295748, 5369685, 7159580, 10739370, 21478740]

約数ペア:

[(1, 21478740), (2, 10739370), (3, 7159580), (4, 5369685), (5, 4295748), (6, 3579790), (10, 2147874), (12, 1789895), (15, 1431916), (19, 1130460), (20, 1073937), (30, 715958), (38, 565230), (57, 376820), (60, 357979), (76, 282615), (83, 258780), (95, 226092), (114, 188410), (166, 129390), (190, 113046), (227, 94620), (228, 94205), (249, 86260), (285, 75364), (332, 64695), (380, 56523), (415, 51756), (454, 47310), (498, 43130), (570, 37682), (681, 31540), (830, 25878), (908, 23655), (996, 21565), (1135, 18924), (1140, 18841), (1245, 17252), (1362, 15770), (1577, 13620), (1660, 12939), (2270, 9462), (2490, 8626), (2724, 7885), (3154, 6810), (3405, 6308), (4313, 4980), (4540, 4731)]