20965760

素因数分解:

$2^7\times 5^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1$

素因数の和:124

約数の個数: 128

約数和(自身を含む): 55520640

約数和(自身を除く): 34554880

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 41, 47, 64, 68, 80, 82, 85, 94, 128, 136, 160, 164, 170, 188, 205, 235, 272, 320, 328, 340, 376, 410, 470, 544, 640, 656, 680, 697, 752, 799, 820, 940, 1088, 1312, 1360, 1394, 1504, 1598, 1640, 1880, 1927, 2176, 2624, 2720, 2788, 3008, 3196, 3280, 3485, 3760, 3854, 3995, 5248, 5440, 5576, 6016, 6392, 6560, 6970, 7520, 7708, 7990, 9635, 10880, 11152, 12784, 13120, 13940, 15040, 15416, 15980, 19270, 22304, 25568, 26240, 27880, 30080, 30832, 31960, 32759, 38540, 44608, 51136, 55760, 61664, 63920, 65518, 77080, 89216, 102272, 111520, 123328, 127840, 131036, 154160, 163795, 223040, 246656, 255680, 262072, 308320, 327590, 446080, 511360, 524144, 616640, 655180, 1048288, 1233280, 1310360, 2096576, 2620720, 4193152, 5241440, 10482880, 20965760]

約数ペア:

[(1, 20965760), (2, 10482880), (4, 5241440), (5, 4193152), (8, 2620720), (10, 2096576), (16, 1310360), (17, 1233280), (20, 1048288), (32, 655180), (34, 616640), (40, 524144), (41, 511360), (47, 446080), (64, 327590), (68, 308320), (80, 262072), (82, 255680), (85, 246656), (94, 223040), (128, 163795), (136, 154160), (160, 131036), (164, 127840), (170, 123328), (188, 111520), (205, 102272), (235, 89216), (272, 77080), (320, 65518), (328, 63920), (340, 61664), (376, 55760), (410, 51136), (470, 44608), (544, 38540), (640, 32759), (656, 31960), (680, 30832), (697, 30080), (752, 27880), (799, 26240), (820, 25568), (940, 22304), (1088, 19270), (1312, 15980), (1360, 15416), (1394, 15040), (1504, 13940), (1598, 13120), (1640, 12784), (1880, 11152), (1927, 10880), (2176, 9635), (2624, 7990), (2720, 7708), (2788, 7520), (3008, 6970), (3196, 6560), (3280, 6392), (3485, 6016), (3760, 5576), (3854, 5440), (3995, 5248)]