21987450

素因数分解:

$2^1\times 3^4\times 5^2\times {\mathrm{61}}^1\times {\mathrm{89}}^1$

素因数の和:174

約数の個数: 120

約数和(自身を含む): 62791740

約数和(自身を除く): 40804290

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 25, 27, 30, 45, 50, 54, 61, 75, 81, 89, 90, 122, 135, 150, 162, 178, 183, 225, 267, 270, 305, 366, 405, 445, 450, 534, 549, 610, 675, 801, 810, 890, 915, 1098, 1335, 1350, 1525, 1602, 1647, 1830, 2025, 2225, 2403, 2670, 2745, 3050, 3294, 4005, 4050, 4450, 4575, 4806, 4941, 5429, 5490, 6675, 7209, 8010, 8235, 9150, 9882, 10858, 12015, 13350, 13725, 14418, 16287, 16470, 20025, 24030, 24705, 27145, 27450, 32574, 36045, 40050, 41175, 48861, 49410, 54290, 60075, 72090, 81435, 82350, 97722, 120150, 123525, 135725, 146583, 162870, 180225, 244305, 247050, 271450, 293166, 360450, 407175, 439749, 488610, 732915, 814350, 879498, 1221525, 1465830, 2198745, 2443050, 3664575, 4397490, 7329150, 10993725, 21987450]

約数ペア:

[(1, 21987450), (2, 10993725), (3, 7329150), (5, 4397490), (6, 3664575), (9, 2443050), (10, 2198745), (15, 1465830), (18, 1221525), (25, 879498), (27, 814350), (30, 732915), (45, 488610), (50, 439749), (54, 407175), (61, 360450), (75, 293166), (81, 271450), (89, 247050), (90, 244305), (122, 180225), (135, 162870), (150, 146583), (162, 135725), (178, 123525), (183, 120150), (225, 97722), (267, 82350), (270, 81435), (305, 72090), (366, 60075), (405, 54290), (445, 49410), (450, 48861), (534, 41175), (549, 40050), (610, 36045), (675, 32574), (801, 27450), (810, 27145), (890, 24705), (915, 24030), (1098, 20025), (1335, 16470), (1350, 16287), (1525, 14418), (1602, 13725), (1647, 13350), (1830, 12015), (2025, 10858), (2225, 9882), (2403, 9150), (2670, 8235), (2745, 8010), (3050, 7209), (3294, 6675), (4005, 5490), (4050, 5429), (4450, 4941), (4575, 4806)]