21011900

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{2309}}^1$

素因数の和:2343

約数の個数: 72

約数和(自身を含む): 56142240

約数和(自身を除く): 35130340

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 25, 26, 28, 35, 50, 52, 65, 70, 91, 100, 130, 140, 175, 182, 260, 325, 350, 364, 455, 650, 700, 910, 1300, 1820, 2275, 2309, 4550, 4618, 9100, 9236, 11545, 16163, 23090, 30017, 32326, 46180, 57725, 60034, 64652, 80815, 115450, 120068, 150085, 161630, 210119, 230900, 300170, 323260, 404075, 420238, 600340, 750425, 808150, 840476, 1050595, 1500850, 1616300, 2101190, 3001700, 4202380, 5252975, 10505950, 21011900]

約数ペア:

[(1, 21011900), (2, 10505950), (4, 5252975), (5, 4202380), (7, 3001700), (10, 2101190), (13, 1616300), (14, 1500850), (20, 1050595), (25, 840476), (26, 808150), (28, 750425), (35, 600340), (50, 420238), (52, 404075), (65, 323260), (70, 300170), (91, 230900), (100, 210119), (130, 161630), (140, 150085), (175, 120068), (182, 115450), (260, 80815), (325, 64652), (350, 60034), (364, 57725), (455, 46180), (650, 32326), (700, 30017), (910, 23090), (1300, 16163), (1820, 11545), (2275, 9236), (2309, 9100), (4550, 4618)]