205457920

素因数分解:

$2^9\times 5^1\times {\mathrm{17}}^1\times {\mathrm{4721}}^1$

素因数の和:4761

約数の個数: 80

約数和(自身を含む): 521705448

約数和(自身を除く): 316247528

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 128, 136, 160, 170, 256, 272, 320, 340, 512, 544, 640, 680, 1088, 1280, 1360, 2176, 2560, 2720, 4352, 4721, 5440, 8704, 9442, 10880, 18884, 21760, 23605, 37768, 43520, 47210, 75536, 80257, 94420, 151072, 160514, 188840, 302144, 321028, 377680, 401285, 604288, 642056, 755360, 802570, 1208576, 1284112, 1510720, 1605140, 2417152, 2568224, 3021440, 3210280, 5136448, 6042880, 6420560, 10272896, 12085760, 12841120, 20545792, 25682240, 41091584, 51364480, 102728960, 205457920]

約数ペア:

[(1, 205457920), (2, 102728960), (4, 51364480), (5, 41091584), (8, 25682240), (10, 20545792), (16, 12841120), (17, 12085760), (20, 10272896), (32, 6420560), (34, 6042880), (40, 5136448), (64, 3210280), (68, 3021440), (80, 2568224), (85, 2417152), (128, 1605140), (136, 1510720), (160, 1284112), (170, 1208576), (256, 802570), (272, 755360), (320, 642056), (340, 604288), (512, 401285), (544, 377680), (640, 321028), (680, 302144), (1088, 188840), (1280, 160514), (1360, 151072), (2176, 94420), (2560, 80257), (2720, 75536), (4352, 47210), (4721, 43520), (5440, 37768), (8704, 23605), (9442, 21760), (10880, 18884)]