20576800

素因数分解:

$2^5\times 5^2\times {\mathrm{17}}^2\times {\mathrm{89}}^1$

素因数の和:143

約数の個数: 108

約数和(自身を含む): 53961390

約数和(自身を除く): 33384590

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 25, 32, 34, 40, 50, 68, 80, 85, 89, 100, 136, 160, 170, 178, 200, 272, 289, 340, 356, 400, 425, 445, 544, 578, 680, 712, 800, 850, 890, 1156, 1360, 1424, 1445, 1513, 1700, 1780, 2225, 2312, 2720, 2848, 2890, 3026, 3400, 3560, 4450, 4624, 5780, 6052, 6800, 7120, 7225, 7565, 8900, 9248, 11560, 12104, 13600, 14240, 14450, 15130, 17800, 23120, 24208, 25721, 28900, 30260, 35600, 37825, 46240, 48416, 51442, 57800, 60520, 71200, 75650, 102884, 115600, 121040, 128605, 151300, 205768, 231200, 242080, 257210, 302600, 411536, 514420, 605200, 643025, 823072, 1028840, 1210400, 1286050, 2057680, 2572100, 4115360, 5144200, 10288400, 20576800]

約数ペア:

[(1, 20576800), (2, 10288400), (4, 5144200), (5, 4115360), (8, 2572100), (10, 2057680), (16, 1286050), (17, 1210400), (20, 1028840), (25, 823072), (32, 643025), (34, 605200), (40, 514420), (50, 411536), (68, 302600), (80, 257210), (85, 242080), (89, 231200), (100, 205768), (136, 151300), (160, 128605), (170, 121040), (178, 115600), (200, 102884), (272, 75650), (289, 71200), (340, 60520), (356, 57800), (400, 51442), (425, 48416), (445, 46240), (544, 37825), (578, 35600), (680, 30260), (712, 28900), (800, 25721), (850, 24208), (890, 23120), (1156, 17800), (1360, 15130), (1424, 14450), (1445, 14240), (1513, 13600), (1700, 12104), (1780, 11560), (2225, 9248), (2312, 8900), (2720, 7565), (2848, 7225), (2890, 7120), (3026, 6800), (3400, 6052), (3560, 5780), (4450, 4624)]