20787900

素因数分解:

$2^2\times 3^1\times 5^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{521}}^1$

素因数の和:564

約数の個数: 144

約数和(自身を含む): 72495360

約数和(自身を除く): 51707460

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 19, 20, 21, 25, 28, 30, 35, 38, 42, 50, 57, 60, 70, 75, 76, 84, 95, 100, 105, 114, 133, 140, 150, 175, 190, 210, 228, 266, 285, 300, 350, 380, 399, 420, 475, 521, 525, 532, 570, 665, 700, 798, 950, 1042, 1050, 1140, 1330, 1425, 1563, 1596, 1900, 1995, 2084, 2100, 2605, 2660, 2850, 3126, 3325, 3647, 3990, 5210, 5700, 6252, 6650, 7294, 7815, 7980, 9899, 9975, 10420, 10941, 13025, 13300, 14588, 15630, 18235, 19798, 19950, 21882, 26050, 29697, 31260, 36470, 39075, 39596, 39900, 43764, 49495, 52100, 54705, 59394, 69293, 72940, 78150, 91175, 98990, 109410, 118788, 138586, 148485, 156300, 182350, 197980, 207879, 218820, 247475, 273525, 277172, 296970, 346465, 364700, 415758, 494950, 547050, 593940, 692930, 742425, 831516, 989900, 1039395, 1094100, 1385860, 1484850, 1732325, 2078790, 2969700, 3464650, 4157580, 5196975, 6929300, 10393950, 20787900]

約数ペア:

[(1, 20787900), (2, 10393950), (3, 6929300), (4, 5196975), (5, 4157580), (6, 3464650), (7, 2969700), (10, 2078790), (12, 1732325), (14, 1484850), (15, 1385860), (19, 1094100), (20, 1039395), (21, 989900), (25, 831516), (28, 742425), (30, 692930), (35, 593940), (38, 547050), (42, 494950), (50, 415758), (57, 364700), (60, 346465), (70, 296970), (75, 277172), (76, 273525), (84, 247475), (95, 218820), (100, 207879), (105, 197980), (114, 182350), (133, 156300), (140, 148485), (150, 138586), (175, 118788), (190, 109410), (210, 98990), (228, 91175), (266, 78150), (285, 72940), (300, 69293), (350, 59394), (380, 54705), (399, 52100), (420, 49495), (475, 43764), (521, 39900), (525, 39596), (532, 39075), (570, 36470), (665, 31260), (700, 29697), (798, 26050), (950, 21882), (1042, 19950), (1050, 19798), (1140, 18235), (1330, 15630), (1425, 14588), (1563, 13300), (1596, 13025), (1900, 10941), (1995, 10420), (2084, 9975), (2100, 9899), (2605, 7980), (2660, 7815), (2850, 7294), (3126, 6650), (3325, 6252), (3647, 5700), (3990, 5210)]