20888960

素因数分解:

$2^7\times 5^1\times {\mathrm{127}}^1\times {\mathrm{257}}^1$

素因数の和:403

約数の個数: 64

約数和(自身を含む): 50526720

約数和(自身を除く): 29637760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 127, 128, 160, 254, 257, 320, 508, 514, 635, 640, 1016, 1028, 1270, 1285, 2032, 2056, 2540, 2570, 4064, 4112, 5080, 5140, 8128, 8224, 10160, 10280, 16256, 16448, 20320, 20560, 32639, 32896, 40640, 41120, 65278, 81280, 82240, 130556, 163195, 164480, 261112, 326390, 522224, 652780, 1044448, 1305560, 2088896, 2611120, 4177792, 5222240, 10444480, 20888960]

約数ペア:

[(1, 20888960), (2, 10444480), (4, 5222240), (5, 4177792), (8, 2611120), (10, 2088896), (16, 1305560), (20, 1044448), (32, 652780), (40, 522224), (64, 326390), (80, 261112), (127, 164480), (128, 163195), (160, 130556), (254, 82240), (257, 81280), (320, 65278), (508, 41120), (514, 40640), (635, 32896), (640, 32639), (1016, 20560), (1028, 20320), (1270, 16448), (1285, 16256), (2032, 10280), (2056, 10160), (2540, 8224), (2570, 8128), (4064, 5140), (4112, 5080)]