19996480

素因数分解:

$2^6\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{113}}^1$

素因数の和:216

約数の個数: 112

約数和(自身を含む): 55595520

約数和(自身を除く): 35599040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 64, 70, 79, 80, 112, 113, 140, 158, 160, 224, 226, 280, 316, 320, 395, 448, 452, 553, 560, 565, 632, 790, 791, 904, 1106, 1120, 1130, 1264, 1580, 1582, 1808, 2212, 2240, 2260, 2528, 2765, 3160, 3164, 3616, 3955, 4424, 4520, 5056, 5530, 6320, 6328, 7232, 7910, 8848, 8927, 9040, 11060, 12640, 12656, 15820, 17696, 17854, 18080, 22120, 25280, 25312, 31640, 35392, 35708, 36160, 44240, 44635, 50624, 62489, 63280, 71416, 88480, 89270, 124978, 126560, 142832, 176960, 178540, 249956, 253120, 285664, 312445, 357080, 499912, 571328, 624890, 714160, 999824, 1249780, 1428320, 1999648, 2499560, 2856640, 3999296, 4999120, 9998240, 19996480]

約数ペア:

[(1, 19996480), (2, 9998240), (4, 4999120), (5, 3999296), (7, 2856640), (8, 2499560), (10, 1999648), (14, 1428320), (16, 1249780), (20, 999824), (28, 714160), (32, 624890), (35, 571328), (40, 499912), (56, 357080), (64, 312445), (70, 285664), (79, 253120), (80, 249956), (112, 178540), (113, 176960), (140, 142832), (158, 126560), (160, 124978), (224, 89270), (226, 88480), (280, 71416), (316, 63280), (320, 62489), (395, 50624), (448, 44635), (452, 44240), (553, 36160), (560, 35708), (565, 35392), (632, 31640), (790, 25312), (791, 25280), (904, 22120), (1106, 18080), (1120, 17854), (1130, 17696), (1264, 15820), (1580, 12656), (1582, 12640), (1808, 11060), (2212, 9040), (2240, 8927), (2260, 8848), (2528, 7910), (2765, 7232), (3160, 6328), (3164, 6320), (3616, 5530), (3955, 5056), (4424, 4520)]