21129420

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{263}}^1$

素因数の和:391

約数の個数: 96

約数和(自身を含む): 64576512

約数和(自身を除く): 43447092

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 103, 130, 156, 195, 206, 260, 263, 309, 390, 412, 515, 526, 618, 780, 789, 1030, 1052, 1236, 1315, 1339, 1545, 1578, 2060, 2630, 2678, 3090, 3156, 3419, 3945, 4017, 5260, 5356, 6180, 6695, 6838, 7890, 8034, 10257, 13390, 13676, 15780, 16068, 17095, 20085, 20514, 26780, 27089, 34190, 40170, 41028, 51285, 54178, 68380, 80340, 81267, 102570, 108356, 135445, 162534, 205140, 270890, 325068, 352157, 406335, 541780, 704314, 812670, 1056471, 1408628, 1625340, 1760785, 2112942, 3521570, 4225884, 5282355, 7043140, 10564710, 21129420]

約数ペア:

[(1, 21129420), (2, 10564710), (3, 7043140), (4, 5282355), (5, 4225884), (6, 3521570), (10, 2112942), (12, 1760785), (13, 1625340), (15, 1408628), (20, 1056471), (26, 812670), (30, 704314), (39, 541780), (52, 406335), (60, 352157), (65, 325068), (78, 270890), (103, 205140), (130, 162534), (156, 135445), (195, 108356), (206, 102570), (260, 81267), (263, 80340), (309, 68380), (390, 54178), (412, 51285), (515, 41028), (526, 40170), (618, 34190), (780, 27089), (789, 26780), (1030, 20514), (1052, 20085), (1236, 17095), (1315, 16068), (1339, 15780), (1545, 13676), (1578, 13390), (2060, 10257), (2630, 8034), (2678, 7890), (3090, 6838), (3156, 6695), (3419, 6180), (3945, 5356), (4017, 5260)]