28040720

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{83}}^1\times {\mathrm{103}}^1$

素因数の和:240

約数の個数: 80

約数和(自身を含む): 68245632

約数和(自身を除く): 40204912

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 83, 103, 164, 166, 205, 206, 328, 332, 410, 412, 415, 515, 656, 664, 820, 824, 830, 1030, 1328, 1640, 1648, 1660, 2060, 3280, 3320, 3403, 4120, 4223, 6640, 6806, 8240, 8446, 8549, 13612, 16892, 17015, 17098, 21115, 27224, 33784, 34030, 34196, 42230, 42745, 54448, 67568, 68060, 68392, 84460, 85490, 136120, 136784, 168920, 170980, 272240, 337840, 341960, 350509, 683920, 701018, 1402036, 1752545, 2804072, 3505090, 5608144, 7010180, 14020360, 28040720]

約数ペア:

[(1, 28040720), (2, 14020360), (4, 7010180), (5, 5608144), (8, 3505090), (10, 2804072), (16, 1752545), (20, 1402036), (40, 701018), (41, 683920), (80, 350509), (82, 341960), (83, 337840), (103, 272240), (164, 170980), (166, 168920), (205, 136784), (206, 136120), (328, 85490), (332, 84460), (410, 68392), (412, 68060), (415, 67568), (515, 54448), (656, 42745), (664, 42230), (820, 34196), (824, 34030), (830, 33784), (1030, 27224), (1328, 21115), (1640, 17098), (1648, 17015), (1660, 16892), (2060, 13612), (3280, 8549), (3320, 8446), (3403, 8240), (4120, 6806), (4223, 6640)]