20898720

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{631}}^1$

素因数の和:675

約数の個数: 144

約数和(自身を含む): 74535552

約数和(自身を除く): 53636832

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 23, 24, 30, 32, 36, 40, 45, 46, 48, 60, 69, 72, 80, 90, 92, 96, 115, 120, 138, 144, 160, 180, 184, 207, 230, 240, 276, 288, 345, 360, 368, 414, 460, 480, 552, 631, 690, 720, 736, 828, 920, 1035, 1104, 1262, 1380, 1440, 1656, 1840, 1893, 2070, 2208, 2524, 2760, 3155, 3312, 3680, 3786, 4140, 5048, 5520, 5679, 6310, 6624, 7572, 8280, 9465, 10096, 11040, 11358, 12620, 14513, 15144, 16560, 18930, 20192, 22716, 25240, 28395, 29026, 30288, 33120, 37860, 43539, 45432, 50480, 56790, 58052, 60576, 72565, 75720, 87078, 90864, 100960, 113580, 116104, 130617, 145130, 151440, 174156, 181728, 217695, 227160, 232208, 261234, 290260, 302880, 348312, 435390, 454320, 464416, 522468, 580520, 653085, 696624, 870780, 908640, 1044936, 1161040, 1306170, 1393248, 1741560, 2089872, 2322080, 2612340, 3483120, 4179744, 5224680, 6966240, 10449360, 20898720]

約数ペア:

[(1, 20898720), (2, 10449360), (3, 6966240), (4, 5224680), (5, 4179744), (6, 3483120), (8, 2612340), (9, 2322080), (10, 2089872), (12, 1741560), (15, 1393248), (16, 1306170), (18, 1161040), (20, 1044936), (23, 908640), (24, 870780), (30, 696624), (32, 653085), (36, 580520), (40, 522468), (45, 464416), (46, 454320), (48, 435390), (60, 348312), (69, 302880), (72, 290260), (80, 261234), (90, 232208), (92, 227160), (96, 217695), (115, 181728), (120, 174156), (138, 151440), (144, 145130), (160, 130617), (180, 116104), (184, 113580), (207, 100960), (230, 90864), (240, 87078), (276, 75720), (288, 72565), (345, 60576), (360, 58052), (368, 56790), (414, 50480), (460, 45432), (480, 43539), (552, 37860), (631, 33120), (690, 30288), (720, 29026), (736, 28395), (828, 25240), (920, 22716), (1035, 20192), (1104, 18930), (1262, 16560), (1380, 15144), (1440, 14513), (1656, 12620), (1840, 11358), (1893, 11040), (2070, 10096), (2208, 9465), (2524, 8280), (2760, 7572), (3155, 6624), (3312, 6310), (3680, 5679), (3786, 5520), (4140, 5048)]