21437520

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{6871}}^1$

素因数の和:6900

約数の個数: 80

約数和(自身を含む): 71578752

約数和(自身を除く): 50141232

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 39, 40, 48, 52, 60, 65, 78, 80, 104, 120, 130, 156, 195, 208, 240, 260, 312, 390, 520, 624, 780, 1040, 1560, 3120, 6871, 13742, 20613, 27484, 34355, 41226, 54968, 68710, 82452, 89323, 103065, 109936, 137420, 164904, 178646, 206130, 267969, 274840, 329808, 357292, 412260, 446615, 535938, 549680, 714584, 824520, 893230, 1071876, 1339845, 1429168, 1649040, 1786460, 2143752, 2679690, 3572920, 4287504, 5359380, 7145840, 10718760, 21437520]

約数ペア:

[(1, 21437520), (2, 10718760), (3, 7145840), (4, 5359380), (5, 4287504), (6, 3572920), (8, 2679690), (10, 2143752), (12, 1786460), (13, 1649040), (15, 1429168), (16, 1339845), (20, 1071876), (24, 893230), (26, 824520), (30, 714584), (39, 549680), (40, 535938), (48, 446615), (52, 412260), (60, 357292), (65, 329808), (78, 274840), (80, 267969), (104, 206130), (120, 178646), (130, 164904), (156, 137420), (195, 109936), (208, 103065), (240, 89323), (260, 82452), (312, 68710), (390, 54968), (520, 41226), (624, 34355), (780, 27484), (1040, 20613), (1560, 13742), (3120, 6871)]