20990100

素因数分解:

$2^2\times 3^1\times 5^2\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1$

素因数の和:146

約数の個数: 144

約数和(自身を含む): 65440256

約数和(自身を除く): 44450156

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 25, 30, 31, 37, 50, 60, 61, 62, 74, 75, 93, 100, 111, 122, 124, 148, 150, 155, 183, 185, 186, 222, 244, 300, 305, 310, 366, 370, 372, 444, 465, 555, 610, 620, 732, 740, 775, 915, 925, 930, 1110, 1147, 1220, 1525, 1550, 1830, 1850, 1860, 1891, 2220, 2257, 2294, 2325, 2775, 3050, 3100, 3441, 3660, 3700, 3782, 4514, 4575, 4588, 4650, 5550, 5673, 5735, 6100, 6771, 6882, 7564, 9028, 9150, 9300, 9455, 11100, 11285, 11346, 11470, 13542, 13764, 17205, 18300, 18910, 22570, 22692, 22940, 27084, 28365, 28675, 33855, 34410, 37820, 45140, 47275, 56425, 56730, 57350, 67710, 68820, 69967, 86025, 94550, 112850, 113460, 114700, 135420, 139934, 141825, 169275, 172050, 189100, 209901, 225700, 279868, 283650, 338550, 344100, 349835, 419802, 567300, 677100, 699670, 839604, 1049505, 1399340, 1749175, 2099010, 3498350, 4198020, 5247525, 6996700, 10495050, 20990100]

約数ペア:

[(1, 20990100), (2, 10495050), (3, 6996700), (4, 5247525), (5, 4198020), (6, 3498350), (10, 2099010), (12, 1749175), (15, 1399340), (20, 1049505), (25, 839604), (30, 699670), (31, 677100), (37, 567300), (50, 419802), (60, 349835), (61, 344100), (62, 338550), (74, 283650), (75, 279868), (93, 225700), (100, 209901), (111, 189100), (122, 172050), (124, 169275), (148, 141825), (150, 139934), (155, 135420), (183, 114700), (185, 113460), (186, 112850), (222, 94550), (244, 86025), (300, 69967), (305, 68820), (310, 67710), (366, 57350), (370, 56730), (372, 56425), (444, 47275), (465, 45140), (555, 37820), (610, 34410), (620, 33855), (732, 28675), (740, 28365), (775, 27084), (915, 22940), (925, 22692), (930, 22570), (1110, 18910), (1147, 18300), (1220, 17205), (1525, 13764), (1550, 13542), (1830, 11470), (1850, 11346), (1860, 11285), (1891, 11100), (2220, 9455), (2257, 9300), (2294, 9150), (2325, 9028), (2775, 7564), (3050, 6882), (3100, 6771), (3441, 6100), (3660, 5735), (3700, 5673), (3782, 5550), (4514, 4650), (4575, 4588)]