21317240

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{4007}}^1$

素因数の和:4044

約数の個数: 64

約数和(自身を含む): 57715200

約数和(自身を除く): 36397960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 19, 20, 28, 35, 38, 40, 56, 70, 76, 95, 133, 140, 152, 190, 266, 280, 380, 532, 665, 760, 1064, 1330, 2660, 4007, 5320, 8014, 16028, 20035, 28049, 32056, 40070, 56098, 76133, 80140, 112196, 140245, 152266, 160280, 224392, 280490, 304532, 380665, 532931, 560980, 609064, 761330, 1065862, 1121960, 1522660, 2131724, 2664655, 3045320, 4263448, 5329310, 10658620, 21317240]

約数ペア:

[(1, 21317240), (2, 10658620), (4, 5329310), (5, 4263448), (7, 3045320), (8, 2664655), (10, 2131724), (14, 1522660), (19, 1121960), (20, 1065862), (28, 761330), (35, 609064), (38, 560980), (40, 532931), (56, 380665), (70, 304532), (76, 280490), (95, 224392), (133, 160280), (140, 152266), (152, 140245), (190, 112196), (266, 80140), (280, 76133), (380, 56098), (532, 40070), (665, 32056), (760, 28049), (1064, 20035), (1330, 16028), (2660, 8014), (4007, 5320)]