19991600

素因数分解:

$2^4\times 5^2\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1$

素因数の和:135

約数の個数: 120

約数和(自身を含む): 52309152

約数和(自身を除く): 32317552

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 25, 40, 41, 46, 50, 53, 80, 82, 92, 100, 106, 115, 164, 184, 200, 205, 212, 230, 265, 328, 368, 400, 410, 424, 460, 530, 575, 656, 820, 848, 920, 943, 1025, 1060, 1150, 1219, 1325, 1640, 1840, 1886, 2050, 2120, 2173, 2300, 2438, 2650, 3280, 3772, 4100, 4240, 4346, 4600, 4715, 4876, 5300, 6095, 7544, 8200, 8692, 9200, 9430, 9752, 10600, 10865, 12190, 15088, 16400, 17384, 18860, 19504, 21200, 21730, 23575, 24380, 30475, 34768, 37720, 43460, 47150, 48760, 49979, 54325, 60950, 75440, 86920, 94300, 97520, 99958, 108650, 121900, 173840, 188600, 199916, 217300, 243800, 249895, 377200, 399832, 434600, 487600, 499790, 799664, 869200, 999580, 1249475, 1999160, 2498950, 3998320, 4997900, 9995800, 19991600]

約数ペア:

[(1, 19991600), (2, 9995800), (4, 4997900), (5, 3998320), (8, 2498950), (10, 1999160), (16, 1249475), (20, 999580), (23, 869200), (25, 799664), (40, 499790), (41, 487600), (46, 434600), (50, 399832), (53, 377200), (80, 249895), (82, 243800), (92, 217300), (100, 199916), (106, 188600), (115, 173840), (164, 121900), (184, 108650), (200, 99958), (205, 97520), (212, 94300), (230, 86920), (265, 75440), (328, 60950), (368, 54325), (400, 49979), (410, 48760), (424, 47150), (460, 43460), (530, 37720), (575, 34768), (656, 30475), (820, 24380), (848, 23575), (920, 21730), (943, 21200), (1025, 19504), (1060, 18860), (1150, 17384), (1219, 16400), (1325, 15088), (1640, 12190), (1840, 10865), (1886, 10600), (2050, 9752), (2120, 9430), (2173, 9200), (2300, 8692), (2438, 8200), (2650, 7544), (3280, 6095), (3772, 5300), (4100, 4876), (4240, 4715), (4346, 4600)]